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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >
| Title: | Trans-dichlorobis(N-p-tolylpyridin-2-amine)palladium(II): Synthesis, structure, fluorescence features and DNA binding |
| Authors: | Kundu, Suman
Maity, Suvendu
Bhadra, Ranjan
Ghosh, Prasanta |
| Keywords: | Density functional calculations
Fluorescence quenching
Palladium
DNA binding |
| Issue Date: | Sep-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Reaction of N-p-tolylpyridin-2-amine (LMe) with H2PdCl4 in boiling acetonitrile and ethanol
solvents mixture
(1:1) affords trans-Pd(LMe)2Cl2
(1) in high yield. (1) is substantiated by spectral data,
single crystal X-ray structure determination, etc. Both (LMe) and (1)
absorb strongly in the UV region ( max, nm ( , 104 M–1cm–1), DCM: (LMe),
310 (1.97), 276 (4.95); (1), 320
(4.36), 270 (6.98). (LMe)
is brightly fluorescent due to intra-ligand charge transfer singlet excited
state ( ex = 332 nm, em = 400 nm;  = 0.621 measured
with respect to anthracene) as elucidated by DFT and TD DFT calculations. In (1), the luminescence of (LMe) is significantly (~ 97
%) quenched ( = 0.016) and the fluorescence parameters are red shifted ( ex
= 378 nm, em = 430 nm). Binding of (1) to CT-DNA has been
investigated by UV-vis spectrum confirming a significant interaction with the
intrinsic binding constant as Kb = ~ 9.78 X 105 M-1 and CT-DNA-ethidium
bromide fluorescence quenching experiment giving the
apparent binding constant as Kapp = 9.02 X 105 M –1. |
| Page(s): | 1443-1449 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.50A(09-10) [September-October 2011]
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