davideandClaude Sonnet 5.5
60aaca3418
Una scheda per fonte in fonti/ (metadati verificati con Crossref/OpenAlex/ Europe PMC, DOI e link, abstract, riassunto del contenuto per le fonti ad accesso aperto lette, citazioni nella tesi, bibliografia della fonte). bibliografia.json: campo fonte per ogni voce; CLAUDE.md aggiornato. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
120 lines
7.2 KiB
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120 lines
7.2 KiB
Markdown
---
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id: 41
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anchor: ref-41
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stato: verificata
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doi: 10.1002/chem.19960020814
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url: https://doi.org/10.1002/chem.19960020814
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anno: 1996
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rivista: "Chemistry – A European Journal"
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volume: "2"
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pagine: "989-991"
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editore: "Wiley"
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tipo: journal-article
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autori: ["Carlos Valdés", "Leticia M. Toledo", "Urs P. Spitz", "JULIUS JUN. REBEK"]
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accesso: closed
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licenza: null
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pmcid: null
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citata_da: 12
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argomenti: ["Supramolecular Chemistry and Complexes", "Crystallography and molecular interactions", "Supramolecular Self-Assembly in Materials"]
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parole_chiave: ["molecular capsules", "ethane", "binding selectivity", "intermolecular hydrogen bonding", "host-guest chemistry", "crystal structure"]
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contenuto_letto: solo_abstract
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tags: [fonte, bibliografia]
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cited_in_sections: [1.3]
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---
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# [41] Valdés (1996) - Structure and Selectivity of a Small Dimeric Encapsulating Assembly
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## Come è scritta nella tesi
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Valdés, C., Toledo, L. M., Spitz, U. & Rebek, J. Structure and Selectivity of a Small Dimeric Encapsulating Assembly. *Chem. – Eur. J.* **2**, 989–991 (1996).
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## Scheda bibliografica
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**Citazione completa:** Valdés, C.; Toledo, L. M.; Spitz, U.; Rebek, J. Structure and Selectivity of a Small Dimeric Encapsulating Assembly. *Chemistry – A European Journal* **1996**, 2 (8), 989-991. https://doi.org/10.1002/chem.19960020814
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- **Pubblicato in:** Chemistry – A European Journal, vol. 2, n. 8, pp. 989-991 (1996)
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- **Editore:** Wiley · tipo: journal-article
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- **ISSN:** 0947-6539, 1521-3765
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- **Data di pubblicazione:** 1996-08-01
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- **Lingua:** en
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### Autori e affiliazioni
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- Carlos Valdés ([ORCID](https://orcid.org/0000-0002-6246-2994)) - Massachusetts Institute of Technology
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- Leticia M. Toledo - Massachusetts Institute of Technology
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- Urs P. Spitz - Massachusetts Institute of Technology
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- JULIUS JUN. REBEK - Scripps Research Institute; Massachusetts Institute of Technology
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## Stato della verifica
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**Verificata (Crossref/OpenAlex)** - fonte dati: Crossref + OpenAlex
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## Dove trovarla
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- **DOI:** https://doi.org/10.1002/chem.19960020814
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- **OpenAlex:** https://openalex.org/W2170678411
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- **Accesso:** closed - il testo completo richiede un abbonamento dell'editore o l'acquisto
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## Abstract
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The binding selectivity of a dimeric molecular capsule in solution and its X‐ray crystal structure in the solid state are reported. The capsule is a self‐complementary bisglycoluril molecule, formed through a series of intermolecular hydrogen bonds. The dimeric host is capable of discriminating in CDCl3 solution between methane and ethane as guests, and direct evidence for the selectivity is presented from 1H NMR studies. The thermodynamic parameters for the encapsulation of methane, obtained from a VT 1H NMR (500 mHz) study, are presented.
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*(Fonte: OpenAlex. Non è il testo integrale dell'articolo.)*
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## Argomenti e parole chiave
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- **Argomenti (OpenAlex):** Supramolecular Chemistry and Complexes (Organic Chemistry); Crystallography and molecular interactions (Physical and Theoretical Chemistry); Supramolecular Self-Assembly in Materials (Biomaterials)
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- **Parole chiave:** molecular capsules, ethane, binding selectivity, intermolecular hydrogen bonding, host-guest chemistry, crystal structure
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- **Concetti:** Selectivity, Intermolecular force, Hydrogen bond, Molecule, Methane, Chemistry, Proton NMR, Crystal structure, Crystallography
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## Contenuto in sintesi
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Il testo completo non è ad accesso aperto e non è stato consultato: sono disponibili solo i metadati e l'abstract riportati sopra. Per approfondire, aprire la fonte dal DOI (o tramite biblioteca/abbonamento).
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## Come è citata nella tesi
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- **Sez. 1.3 Utilizzo di fluorofori in materiali polimerici** (`tesi.md` r. 493): Per via di queste problematiche, quindi, la stabilità del fluoroforo all'interno della matrice deve essere garantita dalla sinergia tra le interazioni secondarie (legami a idrogeno e dipolo-dipolo) con il polimero e l'impiego di host con elevata cristallinità e alta temperatura di transizione vetrosa (Tg), i quali immobilizzano la molecola guest riducendo la mobilità macromolecolare[40,41].
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## Bibliografia della fonte
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La fonte cita 20 riferimenti:
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- s.t. https://doi.org/10.1002/ange.19931051229
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- s.t. https://doi.org/10.1002/anie.199316991
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- s.t. https://doi.org/10.1126/science.8122107
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- s.t. https://doi.org/10.1021/ja00106a010
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- s.t. https://doi.org/10.1002/ange.19951071725
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- Angew. Chem. Int. Ed. Engl. 1995 32 1885
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- s.t. https://doi.org/10.1021/ja00156a010
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- Molecular modeling was performed with MacroModel 3.5X (MM2*force field).
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- s.t. https://doi.org/10.1002/jcc.540110405
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- The centers of both dimers sit en the twofold axis but these axes are offset from each other by rotations about the other two crystallographic axes.
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- s.t. https://doi.org/10.1126/science.270.5241.1485
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- Even though compound2was purified by chromatography with a methanol methylene chloride solvent mixture as eluant inspection of the1H NMR spectrum of the pure dimer does not indicate the presence of methanol inside its cavity.
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- It is difficult to determine spectroscopically whether these dimers are truly empty or occupied by atmospheric gases. We tried to determine the affinity for water of dimer2by1H NMR titration methods but were unable to observe a signal corresponding to included
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- s.t. https://doi.org/10.1002/anie.198912461
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- s.t. https://doi.org/10.1021/ja00046a022
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- s.t. https://doi.org/10.1021/ja00046a023
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- Crystallographic data (excluding structure factors) for the structure reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication no. CCDC‐1220‐16. Copies of the data can be obtained free of charge on
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- SMART V.4.0 Siemens Industrial Automation Madison WI 1994.
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- SAINT V.4.0 Siemens Industrial Automation Madison WI 1995.
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- TeXsan: Single Crystal AnalysisPackage V.1.7‐1 Molecular Structure Corporation The Woodlands TX 1995.
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- Infrared spectroscopic study of C7 intramolecular hydrogen bonds in peptides (1983) - https://doi.org/10.1002/bip.360220908 - citato 27 volte
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- Direct evidence for the effect of intermolecular hydrogen bonding on organogels (2014) - https://doi.org/10.1007/s40242-014-4062-6 - citato 4 volte
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- Intra- and Intermolecular Hydrogen Bonding Control of Supramolecular Structure (1994) - https://doi.org/10.1007/978-94-011-1058-7_6 - citato 0 volte
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- Intramolecular versus intermolecular solution' hydrogen bonding in (1994) - citato 0 volte
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## Metriche
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- Citata **12** volte (OpenAlex); riferimenti nella fonte: 11
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- Citazioni per anno: 2025: 1, 2022: 1, 2016: 1, 2015: 1, 2013: 1, 2012: 1
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[Torna alla bibliografia della tesi](../tesi.md#ref-41) · Generata dal catalogo `bibliografia.json` e da Crossref, OpenAlex, Europe PMC.
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