Selective Aggregation in Multichromophoric Systems

Samanta, Bibek Ranjan (2014) Selective Aggregation in Multichromophoric Systems. Masters thesis, Indian Institute of Science Education and Research Kolkata.

[img] PDF (MS dissertation of Bibek Ranjan Samanta)
Bibek_Ranjan_Samanta.pdf - Submitted Version
Restricted to Repository staff only

Download (2MB)
Official URL:


In this project 2 chromophores have been synthesized using naphthalenebisimide (NBI) as the core molecule. One of them is a monomeric form of NBI with dodecyl chains on either end and other is the dimeric form with the NBIs sharing a xylenediamine on one terminal and the free terminal contains the docecyl chain. The dimer is shown to form strongly coupled aggregates in the ground state which as hypothesized is not a perfect H aggregate but an improper ones with the rings twisted or obliquely inclined to each other. The monomer on the other hand shows strong excimer formation in the excited state. The dimer interacts the most in aromatic solvents and is shown to form stable gels in such solvents. The aromatic solvent system in which the aggregation is studied has predominantly been ortho-xylene.

Item Type: Thesis (Masters)
Additional Information: Supervisor: Dr. Debangshu Chaudhuri
Uncontrolled Keywords: Cyanine Dyes; Dyes; Linkage Groups; Multichromophoric Systems; Naphthalenebisimide; Perylene Bisimide Dyes; Porphyrin Dyes
Subjects: Q Science > QD Chemistry
Divisions: Department of Chemical Sciences
Depositing User: IISER Kolkata Librarian
Date Deposited: 07 Jan 2015 05:37
Last Modified: 08 Jan 2015 11:09

Actions (login required)

View Item View Item