Abstract
We report two novel monomers, Ru1mono with one vinyl group, 4-[(4-vinylbenzylformamidyl)-4′-carboxylacid-2,2′-bipyridyl]-bis[2,2′-bipyridyl] ruthenium(ii) perchlorate and Ru2mono with two vinyl groups, 4,4′-bis[(4-vinylbenzylformamidyl)-2,2′-bipyridyl]-bis[2,2′-bipyridyl] ruthenium(ii) perchlorate. The molecular structures were demonstrated by NMR, mass spectrometry and elemental analysis. Polymers Ru1MVP and Ru2MVP were then co-polymerized under free radical polymerization from Ru1mono or Ru2mono and 4-vinylpyridine with the molar ratio of 9 : 1, respectively. Electrogenerated chemiluminescence (ECL) of Ru1MVP in a thin film on an electrode has been tested. It increased 17 times relative to cis-[Ru(bpy)2PVP10](ClO4)2 (RuPVP) reported in the presence of co-reactant tri-n-propylamine (TPA) at the oxidative peak around 1.16 V with scan rate of 100 mV s−1. Relative to RuPVPECL of Ru2MVP was 110 times greater with TPA, and 40 times greater with another co-reactant, sodium oxalate. The significant enhancement of ECL and improvement in making a stable film could be expected to lead to an applicable immobilized immunoassay technology via ECL.
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Electronic supplementary information (ESI) available: 1H-NMR and 1H-1H COSY-NMR of Ru2COOH, Ru2mono and Ru1mono in D-DMSO. See DOI: 10.1039/b9pp00191c
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Lu, Y. Preparation of novel polypyridyl ruthenium complex polymers with high sensitivity for electrogenerated chemiluminescence via copolymerization. Photochem Photobiol Sci 9, 392–397 (2010). https://doi.org/10.1039/b9pp00191c
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DOI: https://doi.org/10.1039/b9pp00191c