The electrogenerated chemiluminescence (ECL) properties of two neutral cyclometalated Ir(III) complexes, Ir(iqbt)2dpm (1) and its parent complex fac-Ir(iqbt)3(2) [iqbt=1-(benzo[b]thiophen-2-yl)-isoquinolinate], have been investigated in acetonitrile solution. Complexes 1 and 2 display near-infrared (near-IR) ECL emission in acetonitrile with maxima at 712 and 706 nm, respectively. Species 1 and 2 showed a strong increase in ECL intensity upon employing benzoyl peroxide (BPO) as a co-reactant with respect to the annihilation. The remarkable continuous ECL emission in near-IR region makes these complexes promising candidates for development of near-IR-emitting Ir-based labels in diagnostics. Furthermore, encapsulation of complex 1 within silica-PEG nanoparticles was successfully obtained: the resulting 1@NPs are easily solubilized in aqueous media where remarkable ECL emission was observed even in aerated conditions.
Kesarkar, S., Rampazzo, E., Valenti, G., Marcaccio, M., Bossi, A., Prodi, L., et al. (2017). Iridium(III)-Doped Core-Shell Silica Nanoparticles: Near-IR Electrogenerated Chemiluminescence in Water. CHEMELECTROCHEM, 4(7), 1690-1696 [10.1002/celc.201700071].
Iridium(III)-Doped Core-Shell Silica Nanoparticles: Near-IR Electrogenerated Chemiluminescence in Water
KESARKAR, SAGAR;Rampazzo, Enrico;Valenti, Giovanni;Marcaccio, Massimo;Prodi, Luca;Paolucci, Francesco
2017
Abstract
The electrogenerated chemiluminescence (ECL) properties of two neutral cyclometalated Ir(III) complexes, Ir(iqbt)2dpm (1) and its parent complex fac-Ir(iqbt)3(2) [iqbt=1-(benzo[b]thiophen-2-yl)-isoquinolinate], have been investigated in acetonitrile solution. Complexes 1 and 2 display near-infrared (near-IR) ECL emission in acetonitrile with maxima at 712 and 706 nm, respectively. Species 1 and 2 showed a strong increase in ECL intensity upon employing benzoyl peroxide (BPO) as a co-reactant with respect to the annihilation. The remarkable continuous ECL emission in near-IR region makes these complexes promising candidates for development of near-IR-emitting Ir-based labels in diagnostics. Furthermore, encapsulation of complex 1 within silica-PEG nanoparticles was successfully obtained: the resulting 1@NPs are easily solubilized in aqueous media where remarkable ECL emission was observed even in aerated conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
