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Titolo:
Molecular recognition capabilities of a nucleolipid amphiphile (3 ',5 '-distearoyl)-2 '-deoxythymidine to adenosine at the air/water interface and Langmuir-Blodgett films studied by molecular spectroscopy
Autore:
Li, C; Huang, JG; Liang, YQ;
Indirizzi:
Nanjing Univ, State Key Lab Coordinat Chem, Inst Mesoscop Solid State Chem, Nanjing 210093, Peoples R China Nanjing Univ Nanjing Peoples R China 210093 jing 210093, Peoples R China
Titolo Testata:
LANGMUIR
fascicolo: 20, volume: 16, anno: 2000,
pagine: 7701 - 7707
SICI:
0743-7463(20001003)16:20<7701:MRCOAN>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEIC-ACID BASES; AIR-WATER-INTERFACE; NORMAL-ALKYL CHAINS; H STRETCHING MODES; SURFACE; COMPLEMENTARY; DERIVATIVES; SYSTEMS; LONG; ORGANIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Liang, YQ Nanjing Univ, State Key Lab Coordinat Chem, Inst Mesoscop Solid State Chem, Nanjing 210093, Peoples R China Nanjing Univ Nanjing Peoples R China 210093 3, Peoples R China
Citazione:
C. Li et al., "Molecular recognition capabilities of a nucleolipid amphiphile (3 ',5 '-distearoyl)-2 '-deoxythymidine to adenosine at the air/water interface and Langmuir-Blodgett films studied by molecular spectroscopy", LANGMUIR, 16(20), 2000, pp. 7701-7707

Abstract

Monolayer behavior of a nucleolipid amphiphile, (3',5'-distearoyl)-2'-deoxythymidine, on pure water, aqueous 1 mM and 5 mM adenosine solutions was investigated by means of surface pressure-molecular area (pi-A) isotherms, which indicate that both hydrogen-bonding and stacking interactions are present between the (3',5'-distearoyl)-2'-deoxythymidine monolayer and adenosinein subphase, and the recognition of this amphiphile to adenosine is more complete in higher subphase concentration. The ultraviolet-visible (UV-vis),Fourier transform infrared (FTIR)transmission FTIR-attenuated total reflection (ATR), and Fourier transform surface-enhanced Raman scattering (FT-SERS) spectroscopic results indicate that the adenosine molecules in the subphase can be transferred onto solid substrates by Langmuir-Blodgett (LB) technique as a result of the formation of Watson-Crick base-pairing at the air/water interface. The regular and closed packing of the constituent molecules facilitates the photodimerization of the thymine moieties in the headgroup under ultraviolet irradiation even at room temperature. FT-SERS technique, for the first time, was introduced into the research area of molecular recognition occurring at an interface system. High-quality FT-SERS spectra ofsingle LB monolayers obtained in the 1750-500 cm(-1) region, together withthe FTIR-ATR results in the NH-stretching high-frequency region, provide direct evidences for the formation of multiple complementary hydrogen bonds between the base pairs.

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Documento generato il 01/04/20 alle ore 11:41:44