Effect of methylene spacers on the spectral, electrochemical, and structural properties of bis(4,4′-disubstituted-2,2′-bipyridyl) ruthenium(ii) dye analogues

Sheri Lense; Kenneth I. Hardcastle; Cora E. MacBeth

doi:10.1039/b905551g

Effect of methylene spacers on the spectral, electrochemical, and structural properties of bis(4,4′-disubstituted-2,2′-bipyridyl) ruthenium(ii) dye analogues

Sheri Lense
, Kenneth I. Hardcastle
, Cora E. MacBeth

School of Science (Behrend)

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Two new ruthenium complexes, [Ru(L₁^OMe) ₂(NCS)₂] and [Ru(L₂^OMe) ₂(NCS)₂] (where L₁^OMe = 2,2′-bipyridine-4,4′-di(methyl ethanoate) and L₂ ^OMe = 2,2′-bipyridine-4,4′-di(methyl propionate)), have been synthesized and characterized using spectroscopic and electrochemical techniques. The [Ru(L₂^OMe)₂(NCS)₂] complex has also been characterized by X-ray diffraction studies and reveals a distorted octahedral coordination geometry about the ruthenium center. Cyclic voltammetry studies of both complexes exhibit quasi-reversible Ru(ii/iii) couples and a number of ligand reduction events. The complex with one methylene spacer between the bipyridyl ligand and the methyl ester functional group, [Ru(L₁^OMe)₂(NCS)₂], was particularly unstable under reducing conditions. The properties of these complexes are compared with the ethyl ester analogue of the N3 photosensitizer [Ru(L ₀^OEt)₂(NCS)₂].

Original language	English (US)
Pages (from-to)	7396-7401
Number of pages	6
Journal	Dalton Transactions
Issue number	36
DOIs	https://doi.org/10.1039/b905551g
State	Published - 2009

All Science Journal Classification (ASJC) codes

Inorganic Chemistry

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@article{4e636bdd5b70409187ad949cdd5955be,

title = "Effect of methylene spacers on the spectral, electrochemical, and structural properties of bis(4,4′-disubstituted-2,2′-bipyridyl) ruthenium(ii) dye analogues",

abstract = "Two new ruthenium complexes, [Ru(L1OMe) 2(NCS)2] and [Ru(L2OMe) 2(NCS)2] (where L1OMe = 2,2′-bipyridine-4,4′-di(methyl ethanoate) and L2 OMe = 2,2′-bipyridine-4,4′-di(methyl propionate)), have been synthesized and characterized using spectroscopic and electrochemical techniques. The [Ru(L2OMe)2(NCS)2] complex has also been characterized by X-ray diffraction studies and reveals a distorted octahedral coordination geometry about the ruthenium center. Cyclic voltammetry studies of both complexes exhibit quasi-reversible Ru(ii/iii) couples and a number of ligand reduction events. The complex with one methylene spacer between the bipyridyl ligand and the methyl ester functional group, [Ru(L1OMe)2(NCS)2], was particularly unstable under reducing conditions. The properties of these complexes are compared with the ethyl ester analogue of the N3 photosensitizer [Ru(L 0OEt)2(NCS)2].",

author = "Sheri Lense and Hardcastle, \{Kenneth I.\} and MacBeth, \{Cora E.\}",

year = "2009",

doi = "10.1039/b905551g",

language = "English (US)",

pages = "7396--7401",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "36",

}

TY - JOUR

T1 - Effect of methylene spacers on the spectral, electrochemical, and structural properties of bis(4,4′-disubstituted-2,2′-bipyridyl) ruthenium(ii) dye analogues

AU - Lense, Sheri

AU - Hardcastle, Kenneth I.

AU - MacBeth, Cora E.

PY - 2009

Y1 - 2009

N2 - Two new ruthenium complexes, [Ru(L1OMe) 2(NCS)2] and [Ru(L2OMe) 2(NCS)2] (where L1OMe = 2,2′-bipyridine-4,4′-di(methyl ethanoate) and L2 OMe = 2,2′-bipyridine-4,4′-di(methyl propionate)), have been synthesized and characterized using spectroscopic and electrochemical techniques. The [Ru(L2OMe)2(NCS)2] complex has also been characterized by X-ray diffraction studies and reveals a distorted octahedral coordination geometry about the ruthenium center. Cyclic voltammetry studies of both complexes exhibit quasi-reversible Ru(ii/iii) couples and a number of ligand reduction events. The complex with one methylene spacer between the bipyridyl ligand and the methyl ester functional group, [Ru(L1OMe)2(NCS)2], was particularly unstable under reducing conditions. The properties of these complexes are compared with the ethyl ester analogue of the N3 photosensitizer [Ru(L 0OEt)2(NCS)2].

AB - Two new ruthenium complexes, [Ru(L1OMe) 2(NCS)2] and [Ru(L2OMe) 2(NCS)2] (where L1OMe = 2,2′-bipyridine-4,4′-di(methyl ethanoate) and L2 OMe = 2,2′-bipyridine-4,4′-di(methyl propionate)), have been synthesized and characterized using spectroscopic and electrochemical techniques. The [Ru(L2OMe)2(NCS)2] complex has also been characterized by X-ray diffraction studies and reveals a distorted octahedral coordination geometry about the ruthenium center. Cyclic voltammetry studies of both complexes exhibit quasi-reversible Ru(ii/iii) couples and a number of ligand reduction events. The complex with one methylene spacer between the bipyridyl ligand and the methyl ester functional group, [Ru(L1OMe)2(NCS)2], was particularly unstable under reducing conditions. The properties of these complexes are compared with the ethyl ester analogue of the N3 photosensitizer [Ru(L 0OEt)2(NCS)2].

UR - https://www.scopus.com/pages/publications/69949125519

UR - https://www.scopus.com/pages/publications/69949125519#tab=citedBy

U2 - 10.1039/b905551g

DO - 10.1039/b905551g

M3 - Article

AN - SCOPUS:69949125519

SN - 1477-9226

SP - 7396

EP - 7401

JO - Dalton Transactions

JF - Dalton Transactions

IS - 36

ER -

Effect of methylene spacers on the spectral, electrochemical, and structural properties of bis(4,4′-disubstituted-2,2′-bipyridyl) ruthenium(ii) dye analogues

Abstract

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