bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modification of Substrate Specificity Resulting in an Epoxide Hydrolase with Shifted Enantiopreference for (2,3‐Epoxypropyl)benzene
Authors: Gurell Ann , Widersten Mikael 
Published: June 2010

AbstractRandom mutagenesis targeted at hotspots of noncatalytic active‐site residues of potato epoxide hydrolase StEH1 combined with an enzyme‐activity screen allowed the isolation of enzyme variants displaying altered enantiopreference in the catalyzed hydrolysis of (2,3‐epoxypropyl)benzene. The wild‐type enzyme favored the S enantiomer with a ratio of 2.5:1, whereas the variant displaying the most radical functional changes showed a 15:1 preference for the R enantiomer. This mutant had accumulated four substitutions distributed over two out of four mutated hotspots: W106L, L109Y, V141K, and I151V. The underlying causes of the enantioselectivity were a decreased catalytic efficiency in the catalyzed hydrolysis of the S enantiomer combined with retained activity with the R enantiomer. The results demonstrate the feasibility of molding the stereoselectivity of this biocatalytically relevant enzyme.
A General Approach to Fabricate Diverse Noble‐Metal (Au, Pt, Ag, Pt/Au)/Fe2O3 Hybrid Nanomaterials
Authors: Zhang Jun , Liu Xianghong , Guo Xianzhi , Wu Shihua , Wang Shurong 
Published: June 2010

AbstractA novel, facile, and general one‐pot strategy is explored for the synthesis of diverse noble‐metal (Au, Pt, Ag, or Pt/Au)/Fe2O3 hybrid nanoparticles with the assistance of lysine (which is a nontoxic, user friendly amino acid that is compatible with organisms) and without using any other functionalization reagents. Control experiments show that lysine, which contains both amino and carboxylic groups, plays dual and crucial roles as both linker and capping agents in attaching noble metals with a small size and uniform distribution onto an Fe2O3 support. Considering the perfect compatibility of lysine with organism, this approach may find potentials in biochemistry and biological applications. Furthermore, this novel route is also an attractive alternative and supplement to the current methods using a silane coupling agent or polyelectrolyte for preparing hybrid nanomaterials. To demonstrate the usage of such hybrid nanomaterials, a chemical gas sensor has been fabricated from the as‐synthesized Au/Fe2O3 nanoparticles and investigated for ethanol detection. Results show that the hybrid sensor exhibits significantly improved sensor performances in terms of high sensitivity, low detection limit, better selectivity, and good reproducibility in comparison with pristine Fe2O3. Most importantly, this general approach can be further employed to fabricate other hybrid nanomaterials based on different support materials.
Group 2 Promoted Hydrogen Release from NMe2H⋅BH3: Intermediates and Catalysis
Authors: Liptrot David J. , Hill Michael S. , Mahon Mary F. , MacDougall Dugald J. 
Published: June 2010

AbstractBoth homo‐ and heteroleptic alkyl and amide complexes of the Group 2 elements Mg and Ca are shown to be active for the catalytic dehydrocoupling of Me2NH⋅BH3. Reactions of either magnesium dialkyls or the β‐diketiminate complex [HC{(Me)CN(Dipp)}2MgnBu] with four or two equivalents of Me2NHBH3, respectively, produce compounds containing the [H3BNMe2BH2Me2N]− ion, which coordinates to the magnesium centers through MgN and Mg⋅⋅⋅HB interactions in both the solution and solid states. Thermolysis of these compounds at 60 °C produces the cyclic product [(H2BNMe2)2] and, it is proposed, magnesium hydrido species by an unprecedented δ‐hydride elimination process. Calcium‐based species, although less reactive than their magnesium‐based counterparts, are found to engage in similar dehydrocoupling reactivity and to produce a similar distribution of products under thermally promoted catalytic conditions. A mechanism for these observations is presented that involves initial production and insertion of H2BNMe2 into polarized MN bonds as the major BN bond‐forming step. The efficacy of this insertion and subsequent β‐ or δ‐hydride elimination steps is proposed to be dependent upon the charge density and polarizing capability of the participating Group 2 center, providing a rationale for the observed differences in reactivity between magnesium and calcium.
Cu and Au Metal–Organic Frameworks Bridge the Gap between Homogeneous and Heterogeneous Catalysts for Alkene Cyclopropanation Reactions
Authors: Corma Avelino , Iglesias Marta , Llabrés i Xamena Francesc X. , Sánchez Félix 
Published: June 2010

AbstractThe copper and gold metal–organic frameworks (MOFs) [Cu3(BTC)2(H2O)3]n, [Cu3(BTC)2] (BTC=benzene‐1,3,5‐tricarboxylate), and IRMOF‐3‐SI‐Au are active and reusable solid catalysts for the cyclopropanation of alkenes with high chemo‐ and diastereoselectivities. This type of material gives better results than previous solid catalysts while working together with the homogeneous catalysts. These MOFs can help to bridge the gap between homogeneous and heterogeneous catalysis.
Near‐IR Core‐Substituted Naphthalenediimide Fluorescent Chemosensors for Zinc Ions: Ligand Effects on PET and ICT Channels
Authors: Lu Xinyu , Zhu Weihong , Xie Yongshu , Li Xin , Gao Yuan , Li Fuyou , Tian He 
Published: June 2010

AbstractNear‐IR (NIR) emission can offer distinct advantages for both in vitro and in vivo biological applications. Two NIR fluorescent turn‐on sensorsN,N′‐di‐n‐butyl‐2‐(N‐{2‐[bis(pyridin‐2‐ylmethyl)amino]ethyl})‐6‐(N‐piperidinyl)naphthalene‐1,4,5,8‐tetracarboxylic acid bisimide andN,N′‐di‐n‐butyl‐2‐[N,N,N′‐tri(pyridin‐2‐ylmethyl)amino]ethyl‐6‐(N‐piperidinyl)naphthalene‐1,4,5,8‐tetracarboxylic acid bisimide (PND and PNT) for Zn2+based on naphthalenediimide fluorophore are reported. Our strategy was to choose core‐substituted naphthalenediimide (NDI) as a novel NIR fluorophore andN,N‐di(pyridin‐2‐ylmethyl)ethane‐1,2‐diamine (DPEA) orN,N,N′‐tri(pyridin‐2‐ylmethyl)ethane‐1,2‐diamine (TPEA) as the receptor, respectively, so as to improve the selectivity to Zn2+. In the case of PND, the negligible shift in absorption and emission spectra is strongly suggestive that the secondary nitrogen atom (directly connected to the NDI moiety,N1) is little disturbed with Zn2+. The fluorescence enhancement of PND with Zn2+titration is dominated with a typical photoinduced electron‐transfer (PET) process. In contrast, theN1atom for PNT can participate in the coordination of Zn2+ion, diminishing the electron delocalization of the NDI moiety and resulting in intramolecular charge‐transfer (ICT) disturbance. For PNT, the distinct blueshift in both absorbance and fluorescence is indicative of a combination of PET and ICT processes, which unexpectedly decreases the sensitivity to Zn2+. Due to the differential binding mode caused by the ligand effect, PND shows excellent selectivity to Zn2+over other metal ions, with a larger fluorescent enhancement centered at 650 nm. Also both PND and PNT were successfully used to image intracellular Zn2+ions in the living KB cells.
Atomistic Characterisation of Li+ Mobility and Conductivity in Li7−xPS6−xIx Argyrodites from Molecular Dynamics Simulations, Solid‐State NMR, and Impedance Spectroscopy
Authors: Pecher Oliver , Kong Shiao‐Tong , Goebel Thorsten , Nickel Vera , Weichert Katja , Reiner Christof , Deiseroth Hans‐Jörg , Maier Joachim , Haarmann Frank , Zahn Dirk 
Published: June 2010

AbstractThe atomistic mechanisms of Li+ ion mobility/conductivity in Li7−xPS6−xIx argyrodites are explored from both experimental and theoretical viewpoints. Ionic conductivity in the title compound is associated with a solid–solid phase transition, which was characterised by low‐temperature differential scanning calorimetry, 7Li and 127I NMR investigations, impedance measurements and molecular dynamics simulations. The NMR signals of both isotopes are dominated by anisotropic interactions at low temperatures. A significant narrowing of the NMR signal indicates a motional averaging of the anisotropic interactions above 177±2 K. The activation energy to ionic conductivity was assessed from both impedance spectroscopy and molecular dynamics simulations. The latter revealed that a series of interstitial sites become accessible to the Li+ ions, whilst the remaining ions stay at their respective sites in the argyrodite lattice. The interstitial positions each correspond to the centres of tetrahedra of S/I atoms, and differ only in terms of their common corners, edges, or faces with adjacent PS4 tetrahedra. From connectivity analyses and free‐energy rankings, a specific tetrahedron is identified as the key restriction to ionic conductivity, and is clearly differentiated from local mobility, which follows a different mechanism with much lower activation energy. Interpolation of the lattice parameters as derived from X‐ray diffraction experiments indicates a homogeneity range for Li7−xPS6−xIx with 0.97≤x≤1.00. Within this range, molecular dynamics simulations predict Li+ conductivity at ambient conditions to vary considerably.
N‐Sulfinyl Amines as a Nitrogen Source in the Asymmetric Intramolecular Aza‐Michael Reaction: Total Synthesis of (−)‐Pinidinol
Authors: Fustero Santos , Monteagudo Silvia , Sánchez‐Roselló María , Flores Sonia , Barrio Pablo , del Pozo Carlos 
Published: June 2010

AbstractN‐Sulfinyl amines have been successfully employed as nitrogen nucleophiles for the asymmetric intramolecular aza‐Michael reaction. The synthetic strategy involves a cross‐metathesis reaction followed by the Michael‐type cyclization, either in a base‐catalyzed two‐step procedure or in a tandem fashion. The developed methodology allows access to chiral substituted pyrrolidines and piperidines bearing one or two stereocenters and it has been applied to the synthesis of the piperidine alkaloid (−)‐pinidinol.
ChemInform Abstract: Electronic Structures and Properties of Eight‐Coordinate Metal—Polyarsenic Complexes MAs8n‐ (M: V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re)
Authors: Li Jun , Wu Kechen 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Evidence of Bilayer Structure in V2O5 Xerogel.
Authors: Giorgetti Marco , Passerini Stefano , Smyrl William H. , Berrettoni Mario 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: LiEuPSe4 and KEuPSe4: Novel Selenophosphates with the Tetrahedral [PSe4]3‐ Building Block.
Authors: Aitken Jennifer A. , Chondroudis Konstantinos , Young Jr. Victor G. , Kanatzidis Mercouri G. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Structural Features of Ag[AuF4] and Ag[AuF6] and the Structural Relationship of Ag[AgF4]2 and Au[AuF4]2 to Ag[AuF4]2.
Authors: Graudejus Oliver , Wilkinson Angus P. , Bartlett Neil 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Structure, Vibrational Spectra, and Normal Coordinate Analysis of (CH2py2)[Ru(NO)FCl4].
Authors: Reese I. , Preetz W. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Rubidium Stannate(IV), Rb4SnO4.
Authors: Hoch Constantin , Roehr Caroline 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Mercury(II) Polyphosphate, Hg(PO3)2.
Authors: Weil Matthias , Glaum Robert 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ternary Halides of the Type A3MX6. Part 9. Crystal Structures of Na3TiCl6 and K3TiCl6.
Authors: Hinz Dirk , Gloger Thomas , Meyer Gerd 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Sn4.4Mo24O38.
Authors: Barrier N. , Tortelier J. , Gougeon P. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A New Cluster Complex, (NH4)6 [Mo4Se4(CN)12]×6H2O, Containing a Tetranuclear Mixed‐Valence Molybdenum Core.
Authors: Virovets Alexander V. , Fedin Vladimir P. , Samsonenko Denis G. , Clegg William 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Blue Emission of Pr3+ Ions in LaCl3 Crystal Triggered by U3+.
Authors: Deren P. J. , Krupa J.‐C. , Strek W. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Spectroscopic Properties of SrZnCl4:Ln2+ and BaZnCl4:Ln2+ (Ln: Eu, Sm, Tm).
Authors: Wickleder Claudia 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Homoatomic Clusters E93‐ with E: Ge, Sn, and Pb: EPR Spectra, Magnetism and Electrochemistry.
Authors: Faessler T. F. , Hunziker M. , Spahr M. E. , Lueken H. , Schilder H. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Nanocrystalline CuMS2 (M: In or Ga) Through a Solvothermal Process.
Authors: Lu Qingyi , Hu Junqing , Tang Kaibin , Qian Yitai , Zhou Guien , Liu Xianming 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: An ab initio Molecular Orbital Study on the Magnesium Controlled 1,3‐Cycloaddition of Nitrile Oxides and Allylic Alcohols with Regio‐ and Stereoselectivity.
Authors: Fukuda Shohei , Kamimura Akio , Kanemasa Shuji , Hori Kenzi 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Spectroscopic Analysis of Imidazolidines. Part 1. Electron Impact Mass Spectrometry.
Authors: Salerno Alejandra , Hedrera Monica E. , D'Accorso Norma B. , Alho Miriam Martins , Perillo Isabel A. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereochemistry and Conformational Analysis of Hemirubin.
Authors: Huggins Michael T. , Lightner David A. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Reactions of Biginelli Compounds. Part 19. X‐Ray Structure, Conformational Analysis, Enantioseparation, and Determination of Absolute Configuration of the Mitotic Kinesin Eg5 Inhibitor Monastrol.
Authors: Kappe C. Oliver , Shishkin Oleg V. , Uray Georg , Verdino Petra 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Lanthanoid Triflates Catalyzed Reaction of a Silyl Ynolate with Aldimines.
Authors: Shindo Mitsuru , Oya Soichiro , Sato Yusuke , Shishido Kozo 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium‐Catalyzed Asymmetric Allylic Alkylation with a Chiral Monodentate Phosphine Ligand: 8‐Diphenylphosphino‐8′‐methoxy‐1,1′‐binaphthyl.
Authors: Fuji Kaoru , Ohnishi Hiroshi , Moriyama Shoko , Tanaka Kiyoshi , Kawabata Takeo , Tsubaki Kazunori 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chiral Diphenylselenophosphoramides: A New Class of Chiral Ligands for the Titanium(IV) Alkoxide‐Promoted Addition of Diethylzinc to Aldehydes.
Authors: Shi Min , Sui Wen‐Sheng 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Synthesis of 1,4‐Disubstituted Tetrahydroisoquinolines.
Authors: Jullian Valerie , Quiron Jean‐Charles , Husson Henri‐Philippe 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Pt(Me‐Duphos)‐Catalyzed Asymmetric Hydrophosphination of Activated Olefins: Enantioselective Synthesis of Chiral Phosphines.
Authors: Kovacik Ivan , Wicht Denyce K. , Grewal Navrose S. , Glueck David S. , Incarvito Christopher D. , Guzei Ilia A. , Rheingold Arnold L. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: C2‐Symmetric Planar Chiral Ferrocene Diamides by (‐)‐Sparteine‐Mediated Directed ortho‐Lithiation. Synthesis and Catalytic Activity.
Authors: Laufer Radoslaw S. , Veith Ulrich , Taylor Nicholas J. , Snieckus Victor 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Selective Hydrogenation of Benzophenones to Benzhydrols. Asymmetric Synthesis of Unsymmetrical Diarylmethanols.
Authors: Ohkuma Takeshi , Koizumi Masatoshi , Ikehira Hideyuki , Yokozawa Tohru , Noyori Ryoji 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemoenzymatic Approach to Novel Chiral Difunctionalized Ferrocenes.
Authors: Patti Angela , Nicolosi Giovanni 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemoenzymatic Synthesis of Optically Active 2‐Phenyl‐2‐(1H‐1,2,4‐triazol‐1‐ylmethyl)hexanenitrile.
Authors: Im Dai Sig , Cheong Chan Seong , Lee So Ha , Youn Byoung Hee , Kim Seok Chan 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.