Effect of hydrogen bonding and solvent polarity on the fluorescence quenching and dipole moment of 2-methoxypyridin-3-yl-3-boronic acid (Record no. 8518)
[ view plain ]
| 000 -LEADER | |
|---|---|
| fixed length control field | a |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20190315103055.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 190313b xxu||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | AIKTC-KRRC |
| Transcribing agency | AIKTC-KRRC |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 8040 |
| Author | Melavanki, Raveendra |
| 245 ## - TITLE STATEMENT | |
| Title | Effect of hydrogen bonding and solvent polarity on the fluorescence quenching and dipole moment of 2-methoxypyridin-3-yl-3-boronic acid |
| 250 ## - EDITION STATEMENT | |
| Volume, Issue number | Vol. 56(12), December |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | New Delhi |
| Name of publisher, distributor, etc. | NISCAIR |
| Year | 2018 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Pagination | 989-996 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Two photophysical properties namely, fluorescence quenching and dipole moment (both ground state and excited state) of 2-methoxypyridin-3-yl-3-boronic acid (2MPBA) have been investigated in alcohol environment using steady state fluorescence technique at 300 K. In quenching studies, a rare but not unusual observation; negative Stern-Volmer (S-V) deviation has been noticed. It has been explained using the concept of solute’s conformational changes in the ground state due to inter-molecular and intra-molecular hydrogen bonding in alcohol environment. The spectroscopic data has been processed using Lehrer equation and thereby Stern-Volmer constant (KSV) has been evaluated. It has been found to be above 100 for most of the solvents used. The data related to dipole moment has been examined using different solvent polarity functions. Theoretical calculation of dipole moment in the ground state has been done using Gaussian software. The general solute–solvent interactions and hydrogen bond interactions have been found to be operative. An appreciable red shift of about 25 nm in the emission spectra has been identified with the rise in solvent polarity and decrease in molar mass of alcohols. It confirms the π→π* transition as well as the possibility of intra-molecular charge transfer (ICT) character in the emitting singlet state of 2MPBA. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| 9 (RLIN) | 4639 |
| Topical term or geographic name entry element | PHARMACEUTICS |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 8041 |
| Co-Author | Geethanjali, H. S. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 8042 |
| Co-Author | Thipperudrappa, J. |
| 773 0# - HOST ITEM ENTRY | |
| Place, publisher, and date of publication | New Delhi CSIR-NISCAIR |
| International Standard Serial Number | 0019-5596 |
| Title | Indian journal of pure & applied physics (IJPAP) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| URL | http://nopr.niscair.res.in/handle/123456789/45461 |
| Link text | Click here |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Articles Abstract Database |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | School of Pharmacy | School of Pharmacy | Archieval Section | 30/03/2019 | 2018464 | 19/06/2019 | 30/03/2019 | Articles Abstract Database |