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Density Functional Theory Study of Red‐shifted Hydrogen Bonds of 4‐Pyridinemethanol with Water

Density Functional Theory Study of Red‐shifted Hydrogen Bonds of 4‐Pyridinemethanol with Water The hydrogen bonds of 1:1 and 1:2 complexes formed between 4‐pyridinemethanol and water have been investigated using a density functional theory (DFT) method and 6‐311++G∗︁ ∗︁ basis set, and three and eight stable geometries have been obtained for 1:1 and 1:2 complexes, respectively. The interaction energy is −20.536 and −44.256 kJ/mol for the most stable 1:1 and 1:2 complexes, respectively, after the basis set superposition error and zero‐point corrections. The formation of OH···N(O) hydrogen bonds makes OH symmetric stretching modes in the complexes red‐shifted relative to those of the monomer. The natural bond orbit analysis indicates that the intermolecular charge transfer between 4‐pyridinemethanol and water is 0.02642 e and 0.03813 e for the most stable 1:1 and 1:2 complexes, respectively. In addition, TD‐B3LYP/6‐311++G∗︁ ∗︁ calculations show that formation of water‐OH···N and water‐OH···OH hydrogen bonds makes maximum absorbance wavelength λmax blue‐shifted 8–16 nm and red‐shifted 4–11 nm compared to that of 4‐pyridinemethanol monomer molecule, respectively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

Density Functional Theory Study of Red‐shifted Hydrogen Bonds of 4‐Pyridinemethanol with Water

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References (17)

Publisher
Wiley
Copyright
Copyright © 2008 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1001-604X
eISSN
1614-7065
DOI
10.1002/cjoc.200890050
Publisher site
See Article on Publisher Site

Abstract

The hydrogen bonds of 1:1 and 1:2 complexes formed between 4‐pyridinemethanol and water have been investigated using a density functional theory (DFT) method and 6‐311++G∗︁ ∗︁ basis set, and three and eight stable geometries have been obtained for 1:1 and 1:2 complexes, respectively. The interaction energy is −20.536 and −44.256 kJ/mol for the most stable 1:1 and 1:2 complexes, respectively, after the basis set superposition error and zero‐point corrections. The formation of OH···N(O) hydrogen bonds makes OH symmetric stretching modes in the complexes red‐shifted relative to those of the monomer. The natural bond orbit analysis indicates that the intermolecular charge transfer between 4‐pyridinemethanol and water is 0.02642 e and 0.03813 e for the most stable 1:1 and 1:2 complexes, respectively. In addition, TD‐B3LYP/6‐311++G∗︁ ∗︁ calculations show that formation of water‐OH···N and water‐OH···OH hydrogen bonds makes maximum absorbance wavelength λmax blue‐shifted 8–16 nm and red‐shifted 4–11 nm compared to that of 4‐pyridinemethanol monomer molecule, respectively.

Journal

Chinese Journal of ChemistryWiley

Published: Feb 1, 2008

Keywords: ; ;

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