TY - JOUR
T1 - Synthesis, structure, redox, NLO and DNA interaction aspects of [{(L ′-″′)2RuII} 3(μ3-L)]3+ and [(L′) 2RuII(NC5H4S-)]+ [L 3- = 1,3,5-triazine-2,4,6-trithiolato, L ′-″′ = arylazopyridine]
AU - Kar, Sanjib
AU - Pradhan, Biswajit
AU - Sinha, Rajeev Kumar
AU - Kundu, Tapanendu
AU - Kodgire, Prashant
AU - Rao, K. Krishnamurthy
AU - Puranik, Vedavati G.
AU - Lahiri, Goutam Kumar
PY - 2004/6/7
Y1 - 2004/6/7
N2 - The trinuclear complexes [{(L′-″′) 2RuII}3(μ3-L)](ClCO 4)3, (ClO4)3 - (ClO 4)3 {L = trianionic form of 1,3,5-triazine-2,4,6-trithiol; NpC5H4N=Na - C6H 4(R), R= H (L′), m-Me (L″),p-Me (L″′)} and the analogous mononuclear complex [(L′)2RuII(NC 5H4S-)]ClO4 ClO4 were synthesized. Crystal structures of (ClO4)3 and ClO 4 were determined. 3-3- exhibit three successive oxidative couples corresponding to RuIIR IIRIII⇌ RiIIRiIIRu II; RuIIRuIIIRuIII ⇌ Ru IIRuIIRuIII; RuIIIRu IIIRuIII ⇌ RuIIRuIIIRu III where the mixed valent states are moderately coupled. The complexes display multiple reductions associated with the azo functions of the ancillary ligands (L′-″′). The energy of the RuII-based lowest energy MLCT transitions (533-558 nm) involving the π* level of azoimine chromophore of L′-″′ varies depending on the nuclearity as well as substituents in the ligand framework and follows the order: 3+ > 3+ > 3+ > +. The complexes exhibit reasonably high third-order non-linear optical properties with γ = (0.90-2.45) × 10-29 esu. The interactions of the trinuclear complexes [{(L ′)2RuII}3(μ3-L)] 3- 3+, [{(bpy)2RuII} 3(μ3-L)]3- 3+ and [{(phen) 2RuII}3(μ3-L)]3+ 3- (bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline) with the circular and linear forms of p-Bluescript DNA show reduced ethidium bromide fluorescence on gel electrophoresis.
AB - The trinuclear complexes [{(L′-″′) 2RuII}3(μ3-L)](ClCO 4)3, (ClO4)3 - (ClO 4)3 {L = trianionic form of 1,3,5-triazine-2,4,6-trithiol; NpC5H4N=Na - C6H 4(R), R= H (L′), m-Me (L″),p-Me (L″′)} and the analogous mononuclear complex [(L′)2RuII(NC 5H4S-)]ClO4 ClO4 were synthesized. Crystal structures of (ClO4)3 and ClO 4 were determined. 3-3- exhibit three successive oxidative couples corresponding to RuIIR IIRIII⇌ RiIIRiIIRu II; RuIIRuIIIRuIII ⇌ Ru IIRuIIRuIII; RuIIIRu IIIRuIII ⇌ RuIIRuIIIRu III where the mixed valent states are moderately coupled. The complexes display multiple reductions associated with the azo functions of the ancillary ligands (L′-″′). The energy of the RuII-based lowest energy MLCT transitions (533-558 nm) involving the π* level of azoimine chromophore of L′-″′ varies depending on the nuclearity as well as substituents in the ligand framework and follows the order: 3+ > 3+ > 3+ > +. The complexes exhibit reasonably high third-order non-linear optical properties with γ = (0.90-2.45) × 10-29 esu. The interactions of the trinuclear complexes [{(L ′)2RuII}3(μ3-L)] 3- 3+, [{(bpy)2RuII} 3(μ3-L)]3- 3+ and [{(phen) 2RuII}3(μ3-L)]3+ 3- (bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline) with the circular and linear forms of p-Bluescript DNA show reduced ethidium bromide fluorescence on gel electrophoresis.
UR - http://www.scopus.com/inward/record.url?scp=3042584863&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3042584863&partnerID=8YFLogxK
M3 - Article
C2 - 15252573
AN - SCOPUS:3042584863
SN - 1477-9226
SP - 1752
EP - 1760
JO - Dalton Transactions
JF - Dalton Transactions
IS - 11
ER -