Aggregate of alkoxy-bridged Re(I)-rectangles as a probe for photoluminescence quenching
Resource
The Journal of Physical Chemistry A 111 (43): 10953-10960
Journal
Journal of Physical Chemistry A
Journal Volume
111
Journal Issue
43
Pages
10953-10960
Date Issued
2007
Author(s)
Thanasekaran, P.
Wu, J.-Y.
Manimaran, B.
Rajendran, T.
Chang, I.-J.
Rajagopal, S.
Lee, G.-H.
Lu, K.-L.
Abstract
Alkoxy-bridged rhenium(I) rectangles [{(CO)(3)Re(mu-OR)(2)Re(CO)(3)}(2)(mu-bpy)(2)] (1, R = C(4)H(9); 2, R = C(8)H(17); 3, R = C(12)H(25); bpy = 4,4'-bipyridine) comprising long alkyl chains form optically transparent aggregates and exhibit luminescence enhancement in the presence of water. The aggregation of Re(I)-rectangle was followed using a light-scattering technique. Presumably, the enhanced luminescence efficiency resulted from restriction of torsional molecular motion in the aggregates. In addition, the rate of bimolecular quenching of Re(I)-aggregates in the triplet excited state by various electron donors (amines) and acceptors (quinones) was efficient. These results indicate that the excited state of aggregated Re(I) surfactants with an electron acceptor and donor facilitate the electron-transfer quenching process after they became preassociated inside the Re(I)-aggregated species. These synthesized compounds may be useful fluorescent materials in optoelectronic applications.
SDGs
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
468.pdf
Size
221.01 KB
Format
Adobe PDF
Checksum
(MD5):24e297847643fe98b727a4897525c3c8