Synthesis and photophysical studies of non-covalently linked unsymmetrical porphyrins dyads and triads

Sokkalingam, Punidha ; Santra, Sangita ; Mangalampalli, Ravikanth (2007) Synthesis and photophysical studies of non-covalently linked unsymmetrical porphyrins dyads and triads Journal of Porphyrins and Phthalocyanines, 11 (02). pp. 85-94. ISSN 1088-4246

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Official URL: http://www.worldscientific.com/doi/abs/10.1142/S10...

Related URL: http://dx.doi.org/10.1142/S1088424607000114

Abstract

Non-covalent porphyrin dyads and triads containing N3S porphyrin and RuN4 porphyrin subunits were synthesized by treating meso-pyridyl-21-thiaporphyrin with RuTPP(CO)(EtOH) in toluene at refluxing temperature. The dyads and triads were characterized by various spectroscopic techniques and the properties were compared with the reported dyad containing N4 and RuN4 porphyrin subunits. The 1H NMR study of dyads and triads indicated that the inner NH, β-heterocycle and meso-pyridyl protons of the 21-thiaporphyrin unit experienced large upfield shifts as compared to their corresponding monomeric meso-pyridyl-21-thiaporphyrins due to the ring current effect of RuTPP(CO) subunit. The singlet state photophysical properties of N3S porphyrin subunit in dyads and triads showed 50-80 % quenching of fluorescence as observed previously for N4-RuN4 dyad due to heavy ruthenium ion(s).

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing.
Keywords:Porphyrin Dyads and Triads; Non-covalent; 21-Thiaporphyrin; Fluorescence Properties
ID Code:104558
Deposited On:01 Dec 2017 10:51
Last Modified:01 Dec 2017 10:51

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