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Control of coherence length and aggregate size in the J-aggregate of porphyrin

โœ Scribed by A.S.R Koti; Jharna Taneja; N Periasamy

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
188 KB
Volume
375
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The spectroscopic aggregation number (coherence length) and physical size of the J-aggregates of anionic mesotetrakis(4-sulphonatophenyl)porphyrin (H 4 TPPS 2ร€ ) are controlled by ammonium ion concentration. The contributions of absorption and scattering are determined using the extinction and resonance light scattering (RLS) spectra of the TPPS J-aggregate. The highest spectroscopic aggregation number (12.9) was determined for the J-aggregate of hydrodynamic radius of 56 AE 10 nm.

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