About: Molecular Structure of Guanine-Quartet Supramolecular Assemblies in a Gel-State Based on a DFT Calculation of Infrared and Vibrational Circular Dichroism Spectra     Goto   Sponge   NotDistinct   Permalink

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  • The infrared (IR) and vibrational circular dichroism (VCD) spectra of guanosine-5´-hydrazide (G-1), a powerful hydrogelator, have been measured and analyzed on the basis of ab initio modeling. B3LYP/6-31G** DFT calculations predict that G-1, forming a clear solution in deuterated DMSO, is present in monomeric form in this solvent, whereas strong gelation in a phosphate buffer is due to the formation of a guanine(G)-quartet structure, (G-1)4, in which the four G-1 are linked by hydrogen-bonded guanine moieties and stabilized by an alkali metal cation. The B3LYP/6-31G** IR and VCD spectra of the nearly planar G-quartet whose structure is slightly distorted from the C4h symmetry, in which the G-bases interact via four Hoogsteen-type hydrogen bonds and a sodium cation is positioned in the middle of the G-quartet, are in very good agreement with the experimental spectra, indicating that this structure is the predominant structure in the gel state. The geometric parameters are discussed. This study is the f
  • The infrared (IR) and vibrational circular dichroism (VCD) spectra of guanosine-5´-hydrazide (G-1), a powerful hydrogelator, have been measured and analyzed on the basis of ab initio modeling. B3LYP/6-31G** DFT calculations predict that G-1, forming a clear solution in deuterated DMSO, is present in monomeric form in this solvent, whereas strong gelation in a phosphate buffer is due to the formation of a guanine(G)-quartet structure, (G-1)4, in which the four G-1 are linked by hydrogen-bonded guanine moieties and stabilized by an alkali metal cation. The B3LYP/6-31G** IR and VCD spectra of the nearly planar G-quartet whose structure is slightly distorted from the C4h symmetry, in which the G-bases interact via four Hoogsteen-type hydrogen bonds and a sodium cation is positioned in the middle of the G-quartet, are in very good agreement with the experimental spectra, indicating that this structure is the predominant structure in the gel state. The geometric parameters are discussed. This study is the f (en)
  • Infračervená (IČ) spektra a spektra vibračního cirkulárního dichroismu (VCD) účinného hydrogelátoru, guanosin-5´-hydrazidu (G-1), byla měřena a analyzována na základě ab initio modelování. B3LYP/6-31G** DFT výpočty predikují, že G-1 tvořící čirý roztok v deuterovaném DMSO je přítomen v monomerní formě v tomto rozpouštědle, zatímco silné gelovatění ve fosfátovém pufru je zapříčiněno vznikem guaninových(G)-kvartetů, (G-1)4, ve kterých jsou čtyři G-1 molekuly spojeny vodíkovými vazbami mezi guaniny a jsou stabilizovány kationtem alkalického kovu. V nejlepším souladu s experimentálními spektry byla IČ a VCD spektra získaná B3LYP/6-31G** metodou pro takřka planární G-kvartet, jehož struktura je jen mírně vychýlena z C4h symetrie a ve které G-báze interagují prostřednictvím čtyř vodíkových vazeb Hoogsteenovského typu a sodný kation je umístěn uprostřed G-kvartetu. Tato struktura se ukázala být dominantní strukturou ve fázi gelu a její geometrické parametry jsou diskutovány. Tato studie je první, která využ (cs)
Title
  • Molecular Structure of Guanine-Quartet Supramolecular Assemblies in a Gel-State Based on a DFT Calculation of Infrared and Vibrational Circular Dichroism Spectra
  • Molecular Structure of Guanine-Quartet Supramolecular Assemblies in a Gel-State Based on a DFT Calculation of Infrared and Vibrational Circular Dichroism Spectra (en)
  • Molekulární struktura supramolekulárních samoskladných systémů obsahujících guaninový kvartet založená na DFT výpočtech infračervených spekter a spekter vibračního cirkulárního dichroismu (cs)
skos:prefLabel
  • Molecular Structure of Guanine-Quartet Supramolecular Assemblies in a Gel-State Based on a DFT Calculation of Infrared and Vibrational Circular Dichroism Spectra
  • Molecular Structure of Guanine-Quartet Supramolecular Assemblies in a Gel-State Based on a DFT Calculation of Infrared and Vibrational Circular Dichroism Spectra (en)
  • Molekulární struktura supramolekulárních samoskladných systémů obsahujících guaninový kvartet založená na DFT výpočtech infračervených spekter a spekter vibračního cirkulárního dichroismu (cs)
skos:notation
  • RIV/60461373:22340/08:00020689!RIV09-MSM-22340___
http://linked.open...avai/riv/aktivita
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  • Z(MSM6046137301), Z(MSM6046137307)
http://linked.open...iv/cisloPeriodika
  • 14
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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  • 380358
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  • RIV/60461373:22340/08:00020689
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  • gelator; supramolecular chemistry; guanine quartet; vibrational circular dichroism; density functional calculations (en)
http://linked.open.../riv/klicoveSlovo
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  • US - Spojené státy americké
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  • [2471CEEEA7EF]
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  • Langmuir
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http://linked.open...v/svazekPeriodika
  • 24
http://linked.open...iv/tvurceVysledku
  • Böhm, Stanislav
  • Urbanová, Marie
  • Setnička, Vladimír
  • Volka, Karel
  • Nový, Jakub
  • Sreenivasachary, Nampally
http://linked.open...ain/vavai/riv/wos
  • 000257468300066
http://linked.open...n/vavai/riv/zamer
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  • 0743-7463
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  • 22340
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