cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.gopne5
title: Occurrence Download

description: A dataset containing 8 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 8 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0061857-160910150852091/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.plfavi
title: Occurrence Download

description: A dataset containing 32 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 32 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0016921-181003121212138/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jbhudf
title: Occurrence Download

description: A dataset containing 32 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is (Table 1) Proportion of Toxoplasma gondii seropositive arctic foxes (Alopex lagopus) by age group and geographic area"
 ]
}

 The dataset includes 32 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0018815-181003121212138/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wkmawz
title: Occurrence Download

description: A dataset containing 617476040 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Issue is Coordinate rounded"
 ]
}

 The dataset includes 617476040 records from 3738 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013027-190918142434337/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.d5rmgs
title: Occurrence Download

description: A dataset containing 24 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Siganus luridus",
 "Country is Cyprus",
 "HasCoordinate is true"
 ]
}

 The dataset includes 24 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0079351-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.fd6eqb
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Silurus lithophilus)",
 "BasisOfRecord is one of (Specimen, Literature Occurrence, Human Observation, Observation)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1991",
 "Year is less than or equal to 2025"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0079350-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5sj8gv
title: Occurrence Download

description: A dataset containing 2415 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 "BasisOfRecord is one of (Human Observation, Machine Observation, Occurrence evidence, Observation)",
 "TaxonKey is one of (Pseudomys novaehollandiae)",
 "Country is one of (American Samoa, Australia, Christmas Island, Cocos (Keeling) Islands, Cook Islands, Fiji, French Polynesia, Guam, Heard Island and McDonald Islands, Kiribati, Marshall Islands, Micronesia (Federated States of), Nauru, New Caledonia, New Zealand, Niue, Norfolk Island, Northern Mariana Islands, Palau, Papua New Guinea, Pitcairn, Samoa, Solomon Islands, Tokelau, Tonga, Tuvalu, United States Minor Outlying Islands, Vanuatu, Wallis and Futuna)"
 ]
}

 The dataset includes 2415 records from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0079352-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vga5j7
title: Occurrence Download

description: A dataset listing the 255532 species recorded in GBIF matching the query:
{
 "and" : [
 "Country is Brazil",
 "BasisOfRecord is one of (Human Observation, Specimen)"
 ]
}

 The dataset's 255532 records were derived from 2254 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0079332-250717081556266/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34804/supra.20210928127
title: Investigation on the inclusion behavior of neutral red with β-cyclodextrin, hydroxypropyl-β-cyclodextrin and sulfobutylether-β-cyclodextrin

description: null
DOI: 10.34804/supra.20210928246
title: Interfacial Recognition of Acetylcholine by an Amphiphilic p-Sulfonatocalix[8]arene Derivative Incorporated into Dimyristoyl Phosphatidylcholine Vesicles

description: Dodecyl ether derivatives 1-3 of p-sulfonatocalix[n]arene were incorporated into dimyristoyl phosphatidylcholine (DMPC) vesicles, and their binding abilities for acetylcholine (ACh) were examined by using steady-state fluorescence/fluorescence anisotropy and fluorescence correlation spectroscopy (FCS). For the detection of ACh binding to the DMPC vesicles containing 5 mol % of 1-3, competitive fluorophore displacement experiments were performed, where rhodamine 6G (Rh6G) was used as a fluorescent guest. The addition of Rh6G to the DMPC vesicles containing 3 resulted in a decrease in the fluorescence intensity of Rh6G with an increase of its fluorescence anisotropy, indicating that Rh6G binds to the DMPC-3 vesicles. In the case of DMPC-1 and DMPC-2 vesicles, significant changes in the fluorescence spectra of Rh6G were not observed. When ACh was added to the DMPC-3 vesicles in the presence of Rh6G ([3]/[Rh6G]=100), the fluorescence intensity of Rh6G increased with a decrease in its fluorescence anisotropy. From the analysis of fluorescence titration data, the association constants were determined to be 7.1×105 M-1 for Rh6G-3 complex and 1.1×102 M-1 for ACh-3 complex at the DMPC-3 vesicles. To get a direct evidence for the binding of Rh6G and its displacement by ACh at the DMPC-3 vesicles, diffusion times of the Rh6G were measured by using FCS. Binding selectivity of the DMPC-3 vesicles for ACh, choline, GABA, L-aspartic acid, L-glutamic acid, L-arginine, L-lysine, L-histamine and ammonium chloride was also evaluated using FCS.
DOI: 10.34804/supra.20211007405
title: A Comparison of the Host–Guest Inclusion Complexes of 1,8-ANS and 2,6-ANS in Parent and Modified Cyclodextrins - Journal of Inclusion Phenomena and Macrocyclic Chemistry

description: The fluorescent molecules1-anilinonaphthalene-8-sulfonate (1,8-ANS) and2-anilinonaphthalene-6-sulfonate (2,6-ANS) areextremely sensitive to the polarity of their localenvironment, making them excellent probes for thestudy of heterogeneous systems, including cyclodextrin(CD) solutions. Both are only weakly fluorescent in ahighly polar medium, such as water, but are extremelyfluorescent in a relatively nonpolar medium, such aswithin a CD cavity. These two probes are isomers, withmajor structural differences: 1,8-ANS is much bulkierand more spherical, whereas 2,6-ANS is much morestreamlined and rod-shaped. Thus, they show majordifferences in their formation of CD inclusioncomplexes. This is reflected both in the magnitude ofthe observed fluorescence enhancement upon CDinclusion, as well as in the value of the associationconstant for complex formation. The creation of ascale for each probe for their fluorescence in CDsrelative to that in ethanol allows for directcomparisons to be made between the two probes. Theseresults are obtained and compared for the host-guestinclusion complexes of 1,8-ANS and 2,6-ANS with sixCDs: α, β, γ, and theirhydroxypropylated analogs.
DOI: 10.34804/supra.20210928157
title: Identification, classification, and signal amplification capabilities of high-turnover gas binding hosts in ultra-sensitive NMR

description: Labile complexation of cucurbit[6]uril with xenon becomes detectable through saturation transfer with highly efficient gas turnover for ultra-sensitive NMR applications.
DOI: 10.34804/supra.20210928125
title: U-Shaped Conformation of Alkyl Chains Bound to a Synthetic Receptor Cucurbit[8]uril

description: This guest is bent on fitting in: Alkyltrimethylammonium and cucurbit[8]uril (CB[8]) form 1:1 hostâguest complexes with a high binding constant (Kâ106âmâ1). A short hexyl chain can be fully encapsula...
DOI: 10.34804/supra.20210928302
title: Study on the inclusion interactions of β-cyclodextrin and its derivative with dyes by spectrofluorimetry and its analytical application

description: null
DOI: 10.34804/supra.20210928374
title: A Comparative Study of Complexation of β-Cyclodextrin, Calix[4]arenesulfonate and Cucurbit[7]uril with Dye Guests: Fluorescence Behavior and Binding Ability

description: (2007). A Comparative Study of Complexation of β-Cyclodextrin, Calix[4]arenesulfonate and Cucurbit[7]uril with Dye Guests: Fluorescence Behavior and Binding Ability. Supramolecular Chemistry: Vol. 19, No. 7, pp. 517-523.
DOI: 10.34804/supra.20210928211
title: Lithium-7 nuclear magnetic resonance and calorimetric study of lithium crown complexes in various solvents

description: Lithium-7 NMR studies have been carried out on lithium ion complexes with crown ethers 12C4, 15C5, and 18C6 in water and in several nonaqueous solvents. In all cases the exchange between the free and complexed lithium ion was fast on the NMR time scale, and a single, population average, resonance was observed. Both 1:1 and 2:1 (sandwich) complexes were observed between lithium ion and 12C4 in nitromethane solution. The stability of the complexes varied very significantly with the solvent. With the exception of pyridine, the stability varies inversely with the Gutmann donor number of the solvent. In general, the stability order of the complexes was found to be 15C5·Li+>12C4·Li+>18C6·Li+. Calorimetric studies on these complexes show that, in most cases, the complexes are both enthalpy and entropy stabilized.
DOI: 10.34804/supra.20210928104
title: Cucurbit[8]uril Rotaxanes

description: The synthesis of [2]rotaxanes, each comprising a viologen core threaded through a cucurbit[8]uril (Q8, Figure 1) macrocycle and stoppered by tetraphenylmethane groups, and their binding to second guests as inclusion complexes in organic and aqueous media are described. Stoppering was observed to have little effect on binding. Chemical modification of the threaded guest was used to control solubility and binding characteristics, thus demonstrating a novel approach to making artificial receptors with readily modifiable properties.
DOI: 10.34804/supra.20210928199
title: Multivalent Recognition of Peptides by Modular Self-Assembled Receptors

description:  Developing nontraditional approaches to the synthesis and characterization of multivalent compounds is critical to our efforts to study and interface with biological systems and to build new noncovalent materials. This paper demonstrates a biomimetic approach to the construction of discrete, modular, multivalent receptors via molecular self-assembly in aqueous solution. Scaffolds presenting 1−3 viologen groups recruit a respective 1−3 copies of the synthetic host, cucurbit[8]uril, in a noncooperative manner and with a consistent equilibrium association constant (Ka) value of 2 × 106 M−1 per binding site. The assembled mono-, di-, and trivalent receptors bind to their cognate target peptides containing 1−3 Trp residues with Ka values in the range 1.7 × 104−4.7 × 106 M−1 and in predetermined mono- or multivalent binding modes with 31−280-fold enhancements in affinity and additive enthalpies due to multivalency. The extent of valency was determined directly by measuring the visible charge-transfer absorptivity due to the viologen−indole pair. The predictable behavior of this system and its ease of synthesis and analysis make it well suited to serve as a model for multivalent binding and for the multivalent recognition of peptides by design.
DOI: 10.34804/supra.20210928237
title: Ammonium Complexes of Orthoester Cryptands Are Inherently Dynamic and Adaptive

description: Fluxional chemical species such as bullvalene have been a valuable source of inspiration and fundamental insight into the nature of chemical bonds. A supramolecular analogue of bullvalene, i.e., a “fluxional host–guest system”, in which the ensemble of a well-defined host and guest is engaged in continuous, degenerate constitutional rearrangements, is still elusive, however. Here, we report experimental and computational evidence for guest-induced dynamic covalent rearrangements in the ammonium complexes of self-assembled orthoester cryptands. This unique behavior is made possible by the ammonium guest playing a dual role: it is sufficiently acidic to initiate dynamic covalent exchange reactions at the orthoester bridgeheads, and as a hydrogen bond donor it acts as a supramolecular template, governing the outcome of a multitude of possible intra- and intermolecular rearrangement reactions. One particularly striking example of inherent dynamic behavior was observed in host–guest complex [NH4+⊂o-Me2-2.1.1], which spontaneously rearranged into the larger and thermodynamically more stable complex [NH4+⊂o-Me2-2.2.1], even though this process led to the formation of poor host o-Me2-1.1.1 as a consequence of the excess of one subcomponent (diethylene glycol; “1” in our nomenclature). These inherently adaptive host–guest networks represent a unique platform for exploring the interrelationship between kinetic and thermodynamic stability. For instance, as a result of optimal NH4+ binding, complex [NH4+⊂o-Me2-2.2.1] was found to be thermodynamically stable (negligible intermolecular rearrangements over weeks), whereas computational studies indicate that the compound is far from kinetically stable (intramolecular rearrangements).
DOI: 10.34804/supra.20210928385
title: Bis-urea macrocycles with a deep cavity

description: Two bis-urea macrocycles with a deep cavity demonstrate an enzyme-like binding, and the influence of dipole alignments on molecular recognition.
DOI: 10.34804/supra.20220701455
title: Cavitation energies can outperform dispersion interactions

description: Binding interactions, whether between a biological receptor and ligand or between a synthetic host and guest, are frequently stronger for larger molecules than for smaller ones. This is commonly believed to arise from increased dispersion interactions, but it has now been shown that cavitation energiesâalways required to dissolve molecules in solutionâcan be more important.
DOI: 10.34804/supra.20220702457
title: Quantitative SERS Using the Sequestration of Small Molecules Inside Precise Plasmonic Nanoconstructs
DOI: 10.34804/supra.20210928148
title: Selective binding and highly sensitive fluorescent sensor of palmatine and dehydrocorydaline alkaloids by cucurbit[7]uril

description: The complexation behavior of palmatine (P) and dehydrocorydaline (DHC) alkaloid guest molecules by cucurbit[7]uril (CB7) host have been investigated by means of fluorescence spectra in aqueous phosphate buffer solution (pH 7.2). It is found that each alkaloid exhibits dramatic fluorescence enhancement upon c
DOI: 10.34804/supra.2021092889
title: Evidence of Higher Complexes Between Cucurbit[7]uril and Cationic Surfactants

description: Abstract The host–guest assembly of CB7 with a series of alkyl(trimethyl)ammonium (CnTA+) surfactants of different chain lengths (n=6–18) has been studied. The complexation behaviour was investigat...
DOI: 10.34804/supra.20210928298
title: pH-responsive molecular assemblies of pyridylbutadiene derivative with cucurbit[7]uril

description: pH-responsive emission behavior of supramolecular complexes between pyridylbutadiene with CB7 and formation of molecular assemblies is described.
DOI: 10.34804/supra.2021092895
title: Inclusion of Carboxyl Function Inside of Cucurbiturils and its Use in Molecular Switches

description: Organic flip-flop: Cucurbit[n]uril hosts (where n=7,8) and dipyridinium guests form stable inclusion complexes in which the central carboxyl function can be included inside the host cavity. The pseud...
DOI: 10.34804/supra.2021092871
title: Experimental Measurement of Noncovalent Interactions Between Halogens and Aromatic Rings

description: Abstract Chemical double mutant cycles have been used to quantify the interactions of halogens with the faces of aromatic rings in chloroform. The halogens are forced over the face of an aromatic r...
DOI: 10.34804/supra.20210928362
title: Inhibition of insulin fibrillation by amphiphilic sulfonatocalixarene

description: null
DOI: 10.34804/supra.2021092844
title: Effect of Lower-Rim Alkylation ofp-Sulfonatocalix[4]arene on the Thermodynamics of Host-Guest Complexation

description: Abstract The complex stability constants (KS) and thermodynamic parameters (ΔH° and TΔS°) for the 1:1 complexation of two water-soluble calixarenes, p-sulfonatocalix[4]arene (SC4A) and 5,11,17,23-t...
DOI: 10.34804/supra.2021092832
title: Water-mediated inclusion of benzoates and tosylates inside the bambusuril macrocycle

description: A supramolecular complex between benzoates and a bambusuril crystallizes out immediately after mixing in chloroform but only in the presence of residual water molecules. In this complex each of the two portals of the macrocycle is occupied by one benzoate. Carboxylate groups are connected through hydrogen bo
DOI: 10.34804/supra.20210928252
title: p-Sulfonatocalix[8]arene and vitamin C complexation: assessment of photophysical, pKa and antioxidant property

description: Abstract Mode of inclusion complexation of p-sulfonatocalix[8]arene and ascorbic acid in aqueous solution has been investigated in acidic pH based by UV–visible, fluorescence, FT-IR, 1H-NMR and HR-MS spectroscopic studies. Addition of ascorbic acid solution to p-sulfonatocalix[8]arene enhances the fluorescence intensity of p-Sulfonatocalix[8]arene with blue shift in absorption spectra. Hypsochromic shift in absorbance maxima and hyperchromic shift in emission maxima indicates that ascorbic acid experiences less polar microenvironment when bind with SCX8. Binding site and stoichiometry are examined by 1H-NMR and HR-MS techniques. Binding constant (K = 0.42 × 102 M−1) for the inclusion complex is calculated. For complexation, forces like electrostatic attraction, hydrogen bonding and hydrophobic environment of p-sulfonatocalix[8]arene cavity play important role. p-sulfonatocalix[8]arene shows upward pKa shift after binding with Ascorbic acid. The antioxidant property of ascorbic acid has been investigated which shows enhancement by 57% upon complexation with p-sulfonatocalix[8]arene. Graphical Abstract
DOI: 10.34804/supra.20210928287
title: Selective Sensing of Citrate by a Supramolecular 1,8-Naphthalimide/Calix[4]arene Assembly via Complexation-Modulated pKaShifts in a Ternary Complex

description:  A water-soluble supramolecular sensing assembly, composed of an imidazolium-substituted calix[4]arene and a fluorescent aminodiacetate derivative of 1,8-naphthalimide, was studied. Addition of citrate led to a large fluorescence enhancement, while tartrate, acetate, as well as selected inorganic anions gave smaller effects. The sensing principle and selectivity for citrate rely on the formation of a ternary fluorophore−host−anion complex and complexation-induced pKa shifts of an amino group attached to the fluorophore. The complexation of citrate induces a protonation of the amino group, which switches off intramolecular photoinduced electron transfer as the fluorescence quenching pathway, leading to an enhancement of the optical output signal. The intricate sensor principle was corroborated by pH titrations, binding constants, and structural information as obtained by 1H NMR spectroscopy.
DOI: 10.34804/supra.20210928272
title: Spectrophotometric determination of choline in pharmaceutical formulations via host-guest complexation with a biomimetic calixarene receptor

description: null
DOI: 10.34804/supra.20210928162
title: Selective Amine Recognition:  Development of a Chemosensor for Dopamine and Norepinephrine

description:  A boronic acid-containing coumarin aldehyde was designed and synthesized. The sensor binds to catecholamines such as dopamine and norepinephrine by forming an iminium ion with the amine as well as a boronate ester with the catechol. An internal hydrogen bond produces a colorimetric response to these analytes with good selectivity for catecholamines over simple amines. The fluorescence of the sensor is quenched by the catechol.
DOI: 10.34804/supra.2021092878
title: Operational calixarene-based fluorescent sensing systems for choline and acetylcholine and their application to enzymatic reactions

description: Electron-rich anionic calixarenes and resorcinarenes are known receptors for trimethylammonium-containing neurotransmitters, but the development of practical sensor applications has been impeded by the lack of suitable supramolecular sensing ensembles as well as the low selectivity and sensitivity of the mac
DOI: 10.34804/supra.20210928111
title: Host-Assisted Guest Self-Assembly: Enhancement of the Dimerization of Pyronines Y and B by γ-Cyclodextrin

description: Abstract Buckle up! The dimerization of small fluorescent guests is strongly enhanced in presence of a cyclodextrin host. The host cavity acts like a belt to assist the self-assembly of guests (see...
DOI: 10.34804/supra.2021092811
title: A Bambusuril Macrocycle that Binds Anions in Water with High Affinity and Selectivity

description: One ring binds them all: A bambusuril macrocycle is able to selectively capture a large number of different inorganic anions in water. The high stability of the resulting inclusion complexes is due t...
DOI: 10.34804/supra.20210928288
title: Host–guest interaction of coumarin-derivative dyes and cucurbit[7]uril: leading to the formation of supramolecular ternary complexes with mercuric ions

description: The interaction between the studied coumarin derivatives-cucurbit[7]uril complexes and mercuric ions displays a positive cooperative effect relative to the dyes alone.
DOI: 10.34804/supra.20210928163
title: Ultra‐Bright Rhodamines with Sulfobutylether‐β‐Cyclodextrin: A Viable Supramolecular Dye Laser in Aqueous Medium

description: Abstract Although aqueous dye lasers are much sought after, they have been of no practical use, as laser dyes show a strong tendency for aggregation in water, thus diminishing their optical output....
DOI: 10.34804/supra.20210928175
title: Cucurbit[8]uril-templated H and J dimers of bichromophoric coumarin dyes: origin of contrasting emission

description: Supramolecular control of the novel dimer emission from bichromophoric coumarin dyes caught in the cucurbit[8]uril cavity; a facile approach to developing photo-responsive molecular assemblies.