bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: New Ternary Germanides La4Mg5Ge6 and La4Mg7Ge6: Crystal Structure and Chemical Bonding.
Authors: Solokha Pavlo , De Negri Serena , Skrobanska Monika , Saccone Adriana , Pavlyuk Volodymyr , Proserpio Davide M. 
Published: February 2012

AbstractSingle crystals of the title compounds are prepared by induction‐melting of the elements (nominal compositions La20Mg38Ge42 and La16Mg57Ge27, resp.) in Ta crucibles, followed by annealing at 500 °C for 25 d.
ChemInform Abstract: Spin 1/2 Delafossite Honeycomb Compound Cu5SbO6.
Authors: Climent‐Pascual E. , Norby P. , Andersen N. H. , Stephens P. W. , Zandbergen H. W. , Larsen J. , Cava R. J. 
Published: February 2012

AbstractThe title compound is characterized by powder XRD, EPR spectroscopy, and magnetic susceptibility measurements.
ChemInform Abstract: Structural Features and Physical Properties of In2Bi3Se7I, InBi2Se4I and BiSeI.
Authors: Rosenthal Tobias , Doeblinger Markus , Wagatha Peter , Gold Christian , Scheidt Ernst‐Wilhelm , Scherer Wolfgang , Oeckler Oliver 
Published: February 2012

AbstractIn2Bi3Se7I is obtained from a stoichiometric mixture of the elements (argon, 425 °C, 36 h).
ChemInform Abstract: Synthesis, Structure, Chemical Bonding, and Magnetism of the Series RELiGe2 (RE: La—Nd, Sm, Eu).
Authors: Bobev Svilen , You Tae‐Soo , Suen Nian‐Tzu 
Published: February 2012

AbstractThe title compounds are prepared from the elements (Nb ampules, 985—1085 °C) and characterized by single crystal XRD, magnetic measurements, and TB‐LMTO computations.
ChemInform Abstract: Enhancing Hydrogen Evolution Activity in Water Splitting by Tailoring Li+‐Ni(OH)2‐Pt Interfaces.
Authors: Subbaraman Ram , Tripkovic Dusan , Strmcnik Dusan , Chang Kee‐Chul , Uchimura Masanobu , Paulikas Arvydas P. , Stamenkovic Vojislav , Markovic Nenad M. 
Published: February 2012

AbstractControlled arrangement of nanometer‐scale Ni(OH)2 clusters on platinum electrode surfaces increases the catalytic activity for the hydrogen evolution reaction in KOH solution by a factor of eight relative to state‐of‐the‐art metal and metal oxide catalysts.
ChemInform Abstract: Regio‐ and Enantioselective Hydroamination of Dienes by Gold(I)/Menthol Cooperative Catalysis.
Authors: Kanno Osamu , Kuriyama Wataru , Wang Z. Jane , Toste F. Dean 
Published: February 2012

AbstractPyrrolidine and piperidine adducts are formed with high regio‐and enantioselectivities only in the presence of menthol.
ChemInform Abstract: Facile Synthesis of N‐Sulfonylcyclothioureas in Water.
Authors: Wan Guoxiang , Xu Liang , Ma Xiaosi , Zhang Yong , Wang Jian , Zhang Jian , Ma Ning 
Published: February 2012

AbstractThe reaction is conducted under environmentally benign conditions, avoiding heating, thiophosgene, and organic solvents.
ChemInform Abstract: Highly Active Iridium(I) Complexes for the Selective Hydrogenation of Carbon—Carbon Multiple Bonds.
Authors: Bennie Linsey S. , Fraser Calum J. , Irvine Stephanie , Kerr William J. , Andersson Shalini , Nilsson Goeran N. 
Published: February 2012

AbstractNew iridium complexes (I) bearing a bulky NHC/phosphine ligand combination are successfully applied as extremely efficient catalysts for the hydrogenation of different alkenes (II), (IV), (VI), and (VIII).
ChemInform Abstract: Synthesis and Binding Properties of Guanidinium Biscarboxylates.
Authors: Spaeth Andreas , Gonschor Janina , Koenig Burkhard 
Published: February 2012

AbstractA series of title compounds, e.g. (VII) are prepared as potential self‐organized ionophores in molecular recognition of the ammonium‐ion binding site of the enzyme glutaminase His‐F.
ChemInform Abstract: Synthesis of Multisubstituted Cyclopentadienes from Cyclopentenones Prepared via Catalytic Double Aldol Condensation and Nazarov Reaction Sequence.
Authors: Nishina Yuta , Tatsuzaki Tomohiro , Tsubakihara Ayano , Kuninobu Yoichiro , Takai Kazuhiko 
Published: February 2012

AbstractThe Re‐catalyzed reaction of dialkylketones with aldehydes yields cyclopentenones via double aldol condensation/Nazarov cyclization.
ChemInform Abstract: The First One‐Pot Synthesis of 1,3‐Dicarbonyl Adamantanes from 1‐Bromoadamantanes.
Authors: Akhrem Irena S. , Avetisyan Dzhuletta V. , Afanas'eva Lyudmila V. , Goryunov Evgenii I. , Churilova Irina M. , Petrovskii Pavel V. , Kagramanov Nikolai D. 
Published: February 2012

AbstractCBr4·2AlBr3‐mediated carbonylation of 1‐bromoadamantanes (I) followed by quenching the carbonylation products with nucleophiles provides a convenient access to 1,3‐dicarbonyl adamantanes such as (IV), (VI) and (VIII).
ChemInform Abstract: Convenient Synthesis of Terminal Alkynes from anti‐3‐Aryl‐2,3‐dibromopropanoic Acids Using a K2CO3/DMSO System.
Authors: Cheng Xuezhi , Jia Jun , Kuang Chunxiang 
Published: February 2012

AbstractCompounds (I) are prepared under standard conditions by bromination of the corresponding unsaturated carboxylic acids.
ChemInform Abstract: Cellulose‐Supported Ni(NO3) 2·6H2O/2,4,6‐Trichloro‐1,3,5‐triazine (TCT) as a Mild, Selective and Biodegradable System for Nitration of Phenols.
Authors: Nemati Firouzeh , Kiani Hossein , Hayeniaz Yaser Saeidi 
Published: February 2012

AbstractCellulose‐supported Ni(NO3)2 is used as novel reagent for the regioselective formation of o‐nitro phenols.
ChemInform Abstract: Enantioselective Alkynylation of Aromatic Aldehydes: Pyridyl Phenylene Terpeneol Catalysts with Flexible Biaryl Axes.
Authors: Leven Matthias , Mueller David , Goldfuss Bernd 
Published: February 2012

AbstractAmong the ligands (I)‐(III), the former is found to be the most efficient one.
ChemInform Abstract: TiCl4‐Catalyzed Friedel—Crafts Reaction of Trifluoroacetaldehyde Ethyl Hemiacetal (TFAE).
Authors: Zhang Jing , Chen Yong‐Jun , Zhang Liang 
Published: February 2012

AbstractA novel strictly hydroxyl‐directed Friedel—Crafts reaction of various phenols with trifluoroacetaldehyde ethyl hemiacetal (II) is reported.
ChemInform Abstract: Sodium Tetraborate‐dibenzo‐18‐crown Ether‐6 Complex as Reagent in the Synthesis of Cinnamic Acids from Aromatic Aldehydes and Aliphatic Carboxylic Acids.
Authors: Chiriac Constantin I. , Tanasa Fulga , Nechifor Marioara 
Published: February 2012

AbstractA new alternative to the classic Perkin synthesis of cinnamic acids is introduced.
ChemInform Abstract: Facile Synthesis and in vitro Antimalarial Activity of Novel α‐Hydroxy Hydrazonates.
Authors: Khankischpur Mehdi , Hansen Finn K. , Meurer Ronald , Mauz Tobias , Bergmann Baerbel , Walter Rolf D. , Geffken Detlef 
Published: February 2012

AbstractThe compounds (III), (VI), and (IX) are tested in vitro for their antimalarial activity against 3D7 strains of Plasmodium falciparum.
ChemInform Abstract: Condensation Reactions of Aromatic Aldehydes with Active Methylene Compounds Catalyzed by Alkaline Ionic Liquid.
Authors: Wang Dong‐Yue , Xi Guo‐Hong , Ma Jing‐Jun , Wang Chun , Zhang Xiao‐Chao , Wang Qian‐Qian 
Published: February 2012

AbstractThe alkaline ionic liquid‐promoted Knoevenagel condensation is carried out either with microwave irradiation or under thermal conditions (method B: melting or C: grinding).
ChemInform Abstract: Direct Aldol Condensation Reaction of Ethyl Diazoacetate with Trifluoromethyl Ketones.
Authors: Cui Han‐Feng , Wang Lian , Yang Li‐Jun , Nie Jing , Zheng Yan , Ma Jun‐An 
Published: February 2012

AbstractIn the presence of ZnMe2, the title reaction affords a series of fluorinated aldol adducts in good to excellent yields.
ChemInform Abstract: Silicon‐Mediated Direct Conversion of Acyl Chlorides to Carbamoyl Azides or/and Tetrazolinones under Mild Conditions.
Authors: Salama Tarek A. , Elmorsy Saad S. , Khalil Abdel‐Galil M. , Ismail Mohamed A. 
Published: February 2012

AbstractA simple and mild one‐pot procedure for the synthesis of the title compounds (II) and (III), which includes an easy work‐up, is presented by using cheap and readily available reagents.
ChemInform Abstract: Direct Arylation of Unactivated Aromatic C—H Bonds Catalyzed by a Stable Organic Radical.
Authors: Yong Guo‐Ping , She Wen‐Long , Zhang Yi‐Man , Li Ying‐Zhou 
Published: February 2012

AbstractA radical‐catalyzed arylation of arenes (II) with iodides (I) leads to biaryl derivatives (III).
ChemInform Abstract: A Highly Sustainable and Active Catalyst for Suzuki—Miyaura Reaction: Palladium‐Supported Ionic Liquid Catalyst (SILC) Coated with Polymer.
Authors: Hagiwara Hisahiro , Sato Kota , Hoshi Takashi , Suzuki Toshio 
Published: February 2012

AbstractCatalysts coated with different polymers and varying thickness are tested in the reaction of aryl bromides with arylboronic acids.
ChemInform Abstract: Microwave‐Assisted One‐Pot Synthesis of 3‐Amino‐1‐aryl‐8‐bromo‐2,4‐dicyano‐9H‐fluorenes in Water.
Authors: Zhou Yixin , Wang Jianqiang , Du Renjun , Zhang Guohua , Wang Wei , Guo Cheng 
Published: February 2012

AbstractOptimum reaction conditions are examined for the three‐component one‐pot synthesis of title compounds of type (IV) under microwave irradiation.
ChemInform Abstract: One‐Pot Regioselective Synthesis and X‐Ray Crystal Structure of a Stable [60]Fullerene Trisadduct with the eedge,eface,trans‐1 Addition Pattern.
Authors: Riala Maria , Markoulides Marios S. , Moushi Eleni E. , Chronakis Nikos 
Published: February 2012

AbstractThe Bingel functionalization of C60 (II) with a structurally novel tether (I) equipped with three reactive malonate groups affords a C2v‐symmetrical eedge,eface,trans‐1 trisadduct (III) in a complete regioselective manner.
ChemInform Abstract: Application of Azomethine Ylides in the Synthesis of Carbohydrate‐Derived Spiroheterocycles.
Authors: Barman Piyali Deb , Sanyal Ishita , Mandal Sukhendu B. , Banerjee Asish Kumar 
Published: February 2012

Abstract1,3‐Dipolar cycloaddition of azomethine ylides, generated in situ from N‐alkyl α‐amino acids, with dicarbonyl compounds results in a simple synthesis of polycyclic spiro compounds.
ChemInform Abstract: A One‐Pot Deprotection and Intramolecular Oxa‐Michael Addition to Access Angular Trioxatriquinanes.
Authors: Ramakrishna Kota , Kaliappan Krishna P. 
Published: February 2012

AbstractStarting from carbohydrate precursors such as (I), a short synthesis of angular frameworks of type (VI) is developed.
ChemInform Abstract: Synthesis of Some New Tetrahydrobenzo[b]thiophene Derivatives and Tetrahydrobenzothienopyrimidine Derivatives under Microwave Irradiation.
Authors: Abdalha A. A. , Abou El‐Regal M. K. , El‐Kassaby M. A. , Ali A. T. 
Published: February 2012

AbstractStarting from key intermediate (II) several heterocyclic derivatives of expected biological activities are prepared.
ChemInform Abstract: Efficient Synthesis of Apricoxib, CS‐706, a Selective Cyclooxygenase‐2 Inhibitor, and Evaluation of Inhibition of Prostaglandin E2 Production in Inflammatory Breast Cancer Cells.
Authors: Mandal Pijus K. , Freiter Eric M. , Bagsby Allison L. , Robertson Fredika M. , McMurray John S. 
Published: February 2012

AbstractA highly efficient synthesis of the promising Cox‐2 inhibitor, apricoxib (VI), in only three steps from commercially available starting material is given.
ChemInform Abstract: Highly Diastereoselective Claisen Rearrangement Leading to Vicinal Quaternary Carbons Construction of Oxindoles.
Authors: Matsuta Yumiko , Kobari Takayuki , Kurashima Sachiko , Kumakura Yuhsuke , Shinada Masashi , Higuchi Kazuhiro , Kawasaki Tomomi 
Published: February 2012

AbstractClaisen rearrangement of 2‐allyloxyindoles, generated in situ, offers a convenient method for the preparation of the title compounds.
ChemInform Abstract: Synthesis of N‐Alkoxyindol‐2‐ones by Copper‐Catalyzed Intramolecular N‐Arylation of Hydroxamates.
Authors: Kukosha Tatyana , Trufilkina Nadezhda , Katkevics Martins 
Published: February 2012

AbstractA new method allows the synthesis of title compounds (II), (IV) and (VI).
ChemInform Abstract: Novel Synthetic Method of 2‐(2‐Oxoethyl)‐1H‐indole‐3‐carbaldehydes.
Authors: Buksnaitiene Rita , Cikotiene Inga 
Published: February 2012

AbstractThe synthesis of title compounds (II) involves a silver‐catalyzed 6‐endo‐dig acetalization—cyclization followed by immediate hydrolysis of the unstable intermediates (III).
ChemInform Abstract: A Novel Class of Compounds: Synthesis of 5,5′‐Carbonyl‐bis(5,6‐dihydro‐4H‐furo‐ and Thieno‐[2,3‐c]pyrrol‐4‐ones).
Authors: Koza Gani , Balci Metin 
Published: February 2012

AbstractKey steps of the synthesis are the regioselective hydrolysis of biscarboxylate (III), the monoacyl azide formation and subsequent Curtius rearrangement to give isocyanate (VI), and the sequential ring closure to give carbonylbis(dihydrothienopyrrole) (X) (and the carbonylbis(dihydrofuropyrrole) analogously).
ChemInform Abstract: Substituted Phenyl 4‐(2‐Oxoimidazolidin‐1‐yl)benzenesulfonamides as Antimitotics. Antiproliferative, Antiangiogenic and Antitumoral Activity, and Quantitative Structure—Activity Relationships.
Authors: Fortin Sebastien , Wei Lianhu , Moreau Emmanuel , Lacroix Jacques , Cote Marie‐France , Petitclerc Eric , Kotra Lakshmi P. , Gaudreault Rene C. 
Published: February 2012

AbstractForty one 4‐(2‐oxoimidazolidin‐1‐yl)benzenesulfonamide derivatives (I) are synthesized and screened for their biological activity.
ChemInform Abstract: One‐Step Syntheses of Nitrofuranyl Benzimidazoles that Are Active Against Multidrug‐Resistant Bacteria.
Authors: Moraski Garrett C. , Thanassi Jane A. , Podos Steven D. , Pucci Michael J. , Miller Marvin J. 
Published: February 2012

AbstractFive title compounds are prepared and tested for their antibacterial activities.
ChemInform Abstract: Synthesis of 6H‐Dibenzo[b,d]pyran‐6‐ones Using the Inverse Electron Demand Diels—Alder Reaction.
Authors: Pottie Ian R. , Nandaluru Penchal Reddy , Benoit Wendy L. , Miller David O. , Dawe Louise N. , Bodwell Graham J. 
Published: February 2012

AbstractIn some cases, the dihydro analogues are obtained which can smoothly be converted into the title compounds by treatment with DDQ.
ChemInform Abstract: Synthesis and Biological Evaluation of 1‐Substituted‐3‐(6‐methylpyridin‐2‐yl)‐4‐([1,2,4]triazolo [1,5‐a]pyridin‐6‐yl)pyrazoles as Transforming Growth Factor‐β Type 1 Receptor Kinase Inhibitors.
Authors: Jin Cheng Hua , Krishnaiah Maddeboina , Sreenu Domalapally , Subrahmanyam Vura Bala , Rao Kota Sudhakar , Mohan Annaji Venkata Nagendra , Park Chul‐Yong , Son Jee‐Yeon , Sheen Yhun Yhong , Kim Dae‐Kee 
Published: February 2012

AbstractTitle compound (VIIb), the most potent derivative synthesized, inhibits ALK5 phosphorylation with an IC50 value of 0.57 nM and shows 94% inhibition at 100 nM in a luciferase reporter assay.
ChemInform Abstract: Convenient Synthesis of 3,5‐Biscarbamoyl‐pyridine Derivatives.
Authors: Wang Xiayun , Zhu Yiwen , Zhang Min , Lu Dongliang , Qian Qun , Chen Yali , Cao Weiguo , Song Liping , Deng Hongmei 
Published: February 2012

AbstractThe described procedure provides a facile work‐up.
ChemInform Abstract: Novel 1‐Alkynyl Substituted 1,2‐Dihydroquinoline Derivatives from Nimesulide (and Their 2‐Oxo Analogues): A New Strategy to Identify Inhibitors of PDE4B.
Authors: Pal Sarbani , Durgadas Shylaprasad , Nallapati Suresh Babu , Mukkanti Khagga , Kapavarapu Ravikumar , Meda Chandana Lakshmi T. , Parsa Kishore V. L. , Pal Manojit 
Published: February 2012

AbstractA number of novel arylpropynyl‐substituted dihydroquinoline derivatives related to nimesulide [cf.
ChemInform Abstract: Synthesis of 2‐Quinolinecarboxamide Derivatives as Potential HDAC Inhibitors.
Authors: Habarova O. , Bobileva O. , Loza E. , Romancikova N. 
Published: February 2012

AbstractA series of quinolinecarboxamide derivatives are synthesized and screened for their histone deacetylase inhibitory activity.
ChemInform Abstract: New Strategy for the Synthesis of 5‐Aryl‐1H,1′H‐spiro[furo [2,3‐d]pyrimidine‐6,5′‐pyrimidine]‐2,2′,4,4′,6′(3H,3′H,5H)‐pentaones and Their Sulfur Analogues
Authors: Jalilzadeh Mohammad , Pesyan Nader Noroozi 
Published: February 2012

Abstractvia L‐tartaric acid mediated reaction of barbituric acids with cyanogen bromide and aromatic aldehydes
ChemInform Abstract: Amberlyst‐15: An Efficient and Reusable Catalyst for Multi‐Component Synthesis of 3,4‐Dihydroquinoxalin‐2‐amine Derivatives at Room Temperature.
Authors: Chari Murugulla Adharvana 
Published: February 2012

AbstractThe optimized conditions are applied to the preparation of 20 derivatives of pharmaceutical interest.
ChemInform Abstract: Synthesis and Insecticidal Activities of 1,3,5‐Trisubstituted‐1,3,5‐hexahydrotriazine‐2‐N‐nitroimines.
Authors: Xue Sijia , Ma Xubo , Bu Hongfei , Liu Li , Xu Xiao 
Published: February 2012

AbstractAll compounds (IV) are tested for insecticidal activities against Nilaparvata lugens and Aphis medicaginis, respectively.
ChemInform Abstract: A Single, Low, Oral Dose of a 5‐Carbon‐Linked Trioxane Dimer Orthoester Plus Mefloquine Cures Malaria‐Infected Mice.
Authors: Moon Deuk Kyu , Tripathi Abhai , Sullivan David , Siegler Maxime A. , Parkin Sean , Posner Gary H. 
Published: February 2012

AbstractTrioxane dimer orthoesters (VI) and (VIII) are obtained in moderate overall yields from the natural trioxane artemisinin.
ChemInform Abstract: Synthesis and Insecticidal Activities of Novel Spin‐Labeled Derivatives of Camptothecin.
Authors: Liu Ying‐Qian , et al. et al. 
Published: February 2012

AbstractIntermediate (Ia) and eight spin‐labeled camptothecin derivatives like (Ib) are synthesized from camptothecin and evaluated for their insecticidal activity against the fifth‐instar larva B.longissima in vivo.
Process Optimized and Environmentally Compliant Nanoparticle‐Wax Formulations as Additives for Thermoplastic Polymers
Authors: Bauer Kevin , Eloo Christina , Peuker Urs A. 
Published: February 2012

AbstractDie feste Verkapselung von deagglomerierten Nanopartikeln ist eine große technische Herausforderung. Zur Deagglomeration des Partikelmaterials werden verschiedene Verfahren eingesetzt und die Produkte mittels Phasenkontrast‐Rasterkraftmikroskopie, analytischer Zentrifugation und SEM hinsichtlich ihrer Dispergierqualität untersucht. Abschließend werden verschiedene Komposite hergestellt und die Abhängigkeit der Kompositeigenschaften von verschiedenen Prozessparametern überprüft.
Modulating Self‐Assembly of Amyloidogenic Proteins as a Therapeutic Approach for Neurodegenerative Diseases: Strategies and Mechanisms
Authors: Liu Tingyu , Bitan Gal 
Published: February 2012

AbstractAbnormal protein assembly causes multiple devastating disorders in the central nervous system (CNS), such as Alzheimer’s, Parkinson’s, Huntington’s, and prion diseases. Due to the now extended human lifespan, these diseases have been increasing in prevalence, resulting in major public health problems and the associated financial difficulties worldwide. The wayward proteins that lead to disease self‐associate into neurotoxic oligomers and go on to form fibrillar polymers through multiple pathways. Thus, a range of possible targets for pharmacotherapeutic intervention exists along these pathways. Many compounds have shown different levels of effectiveness in inhibiting aberrant self‐assembly, dissociating existing aggregates, protecting cells against neurotoxic insults, and in some cases ameliorating disease symptoms in vivo, yet achieving efficient, disease‐modifying therapy in humans remains a major unattained goal. To a large degree, this is because the mechanisms of action for these drugs are essentially unknown. For successful design of new effective drugs, it is crucial to elucidate the mechanistic details of their action, including the actual target(s) along the protein aggregation pathways, how the compounds modulate these pathways, and their effect at the cellular, tissue, organ, and organism level. Here, the current knowledge of major mechanisms by which some of the more extensively explored drug candidates work are discussed. In particular, we focus on three prominent strategies: 1) stabilizing the native fold of amyloidogenic proteins, 2) accelerating the aggregation pathways towards the fibrillar endpoint thereby reducing accumulation of toxic oligomers, and 3) modulating the assembly process towards nontoxic oligomers/aggregates. The merit of each strategy is assessed, and the key points to consider when analyzing the efficacy of possible drug candidates and their mechanism of action are discussed.
Concerted Interaction between Pnicogen and Halogen Bonds in XClFH2PNH3(X=F, OH, CN, NC, and FCC)
Authors: Li Qing‐Zhong , Li Ran , Liu Xiao‐Feng , Li Wen‐Zuo , Cheng Jian‐Bo 
Published: February 2012

AbstractWe analyze the interplay between pnicogen‐bonding and halogen‐bonding interactions in the XClFH2PNH3(X=F, OH, CN, NC, and FCC) complex at the MP2/aug‐cc‐pVTZ level. Synergetic effects are observed when pnicogen and halogen bonds coexist in the same complex. These effects are studied in terms of geometric and energetic features of the complexes. Natural bond orbital theory and Bader’s theory of “atoms in molecules” are used to characterize the interactions and analyze their enhancement with varying electron density at critical points and orbital interactions. The physical nature of the interactions and the mechanism of the synergetic effects are studied using symmetry‐adapted perturbation theory. By taking advantage of all the aforementioned computational methods, the present study examines how both interactions mutually influence each other.
Binary Mixtures of Ionic Liquids: A Joint Approach to Investigate their Properties and Catalytic Ability
Authors: D'Anna Francesca , Marullo Salvatore , Vitale Paola , Noto Renato 
Published: February 2012

AbstractThe growing interest in the properties and applications of ionic liquids has recently led to research into the possibility of using their binary mixtures. This work reports on the effects of binary mixtures of ionic liquids on the outcome of organic reactions such as the mononuclear rearrangement of heterocycles and the solvatochromic behavior of Nile Red. Binary mixtures formed by ionic liquids differing in the structure of the cation and the anion are taken into account. In particular, ionic liquids such as 1‐benzyl‐3‐butylimidazolium bis(trifluoromethanesulfonyl)imide, 1‐(2,3,4,5,6‐pentafluorobenzyl)‐3‐butylimidazolium bis(trifluoromethanesulfonyl)imide, and 1‐benzyl‐3‐butylimidazolium tetrafluoroborate, are studied. To achieve a deep understanding of the properties of ionic‐liquid binary mixtures, their three‐dimensional organization was analyzed by a combination of resonance light scattering, UV/Vis spectroscopy, and 1H and 19F NMR spectroscopy. Data collected herein evidence that the most significant changes in the ionic lattice structure, and consequently the most pronounced effects exerted as solvent media, occur when the studied system involves a blend of different anions.
Modification of n‐Type Organic Semiconductor Performance of Perylene Diimides by Substitution in Different Positions: Two‐Dimensional π‐Stacking and Hydrogen Bonding
Authors: Zhang Ming‐Xing , Zhao Guang‐Jiu 
Published: February 2012

AbstractPerylene diimides (PDIs) and their derivatives are active n‐type semiconducting materials widely used in organic electronic devices. A series of PDI derivatives have been investigated by quantum chemistry calculations combined with Marcus–Hush electron‐transfer theory. The substitution of three different sites of a PDI induces large changes in its electron‐transfer mobility. 2,5,8,11‐Tetrachloro‐PDI with four chlorine atoms in ortho positions shows both large electron‐ and hole‐transfer mobilities of 0.116 and 0.650 cm2 V−1 s−1, respectively, indicative of a potentially highly efficient ambipolar organic semiconducting material. The calculated electron‐transfer mobility of 1,6,7,12‐tetrachloro‐PDI is 0.081 cm2 V−1 s−1, which is in good agreement with the experimental result. Octachloro‐PDIs have the largest electron mobility among these derivatives, although the π system of the central core is twisted. 2D π‐stacking and hydrogen bonds formed at the imide positions are responsible for the large mobility. Simulated anisotropic transport mobility curves of these materials prove the magnitude of the mobility that appears when the measuring transistor channel is along the a‐axis of the crystal, which is the direction of hydrogen bond formation.