DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/3905

Title: Infrared-Optical Double Resonance Spectroscopic Measurements on 2-(2 '-Pyridyl)benzimidazole and its Hydrogen Bonded Complexes with Water and Methanol
Authors: GUIN, M
MAITY, S
PATWARI, GN
Keywords: state proton-transfer
proton/hydrogen atom relay
aqueous-solution
selective enhancement
fluorescence-spectra
dual fluorescence
supersonic jets
slow dynamics
ammonia-wire
clusters
Issue Date: 2010
Publisher: AMER CHEMICAL SOC
Citation: JOURNAL OF PHYSICAL CHEMISTRY A, 114(32), 8323-8330
Abstract: The H(2)O and MeOH complexes of 2-(2'-pyridyl)benzimidazole (213131) were investigated using laser induced fluorescence and IR-UV double resonance spectroscopic techniques. The 08 band for the SI So electronic transition of 2PBI was observed at 31 616 cm(-1), and corresponding transitions for the H(2)O and MeOH complexes show substantial red shifts of 1059 and 1203 cm(-1), respectively. A long progression up to v' = 5 in the 92 cm(-1) vibrational mode was observed for bare 2PBI, which is considerably shortened to v' = 2 and v' = I for the H(2)O and MeOH complexes, respectively. The combined experimental and theoretical results suggest that both H(2)O and MeOH form cyclic complex with 2PBI incorporating N-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds. Comparison with other known hydrogen-bonded H(2)O complexes of bifunctional aza-heteroaromatic molecules suggest that 2PBI-H(2)O is probably one of the strongest of all known complexes. Further, the experimental data in combination with calculations suggests that the hydrogen atom/proton transfer leading to tautomeric form might be thermodynamically spontaneous in the electronic excited state, due to explicit solvent (H(2)O and MeOH) participation.
URI: http://dx.doi.org/10.1021/jp104952v
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3905
http://hdl.handle.net/10054/3905
ISSN: 1089-5639
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback