In situ reversible redox switching of first hyperpolarizability of bimetallic ruthenium complexes

Karthika, C and Kumar, S R Sarath and Kathuria, L and Das, P K and Samuelson, A G (2019) In situ reversible redox switching of first hyperpolarizability of bimetallic ruthenium complexes. In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 21 (21). pp. 11079-11086.

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Abstract

In this article we report the reversible redox switching of first hyperpolarizability of bimetallic ruthenium complexes bridged by bipyridyl tetrazine (bptz) ligands by second harmonic light scattering experiments (SHLS). We have synthesised RuII(acac) (2)(CH3CN) (2)] and (acac) Ru-2-bptz-Ru(acac) (2)] complexes and measured their first hyperpolarizabilities as a function of in situ electrochemical oxidation/reduction of the metal centres. As a result of the oxidation of ruthenium centre from Ru(II) to Ru(III), the molecular hyperpolarizability of the complexes went up. The mixed-valence intermediate bimetallic complex and not the fully oxidized complex exhibit the highest beta value of 780 X 10(-30) esu. We also demonstrated that the hyperpolarizability is reversible with the change of the oxidation state of the metal and both the complexes are stable for several cycles of redox switching. The experimental results are also supported by calculations.

Item Type:	Journal Article
Publication:	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Publisher:	ROYAL SOC CHEMISTRY
Additional Information:	copyright of this article belongs to ROYAL SOC CHEMISTRY
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	25 Jul 2019 06:05
Last Modified:	25 Jul 2019 06:05
URI:	http://eprints.iisc.ac.in/id/eprint/63131

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