Shu Jiangnan, Han Zhili, Zheng Tianhua, Du Dexin, Zou Guizheng, Cui Hua
CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
School of Chemistry and Chemical Engineering, Shandong University , Jinan, Shandong 250100, China.
Anal Chem. 2017 Dec 5;89(23):12636-12640. doi: 10.1021/acs.analchem.7b04175. Epub 2017 Nov 13.
Most electrochemiluminescence (ECL) studies involve single luminophore with a unique emission process, which severely limits its applications. Recently, multicolor ECL has attracted considerable interests. Herein, we report a novel nanoluminophore prepared by coating 5,10,15,20-tetrakis(4-carboxyphenyl)-porphyrin (TCPP) and N-(4-aminobutyl)-N-ethylisoluminol (ABEI) on the surface of TiO nanoparticles (TiO-TCPP-ABEI), which exhibited unique potential-resolved multicolor ECL emissions using HO and KSO as coreactants in an aqueous solution. Three ECL peaks, ECL-1 at 458 nm, ECL-2 at 686 nm, and ECL-3 at 529 nm, were obtained with peak potentials of 1.05, -1.65, and -1.85 V, which were attributed to the ECL emission of ABEI, TCPP, and TiO moiety of the nanoluminophores, respectively. Potential-resolved multicolor ECL from a nanoluminophore was observed for the first time in an aqueous solution. It opens a new research area of multicolor ECL of nanoluminophores, which is of great importance in ECL field from fundamental studies to practical applications.
大多数电化学发光（ECL）研究都涉及具有独特发射过程的单一发光体，这严重限制了其应用。近年来，多色ECL引起了广泛关注。在此，我们报道了一种通过在TiO纳米颗粒（TiO-TCPP-ABEI）表面包覆5,10,15,20-四（4-羧基苯基）卟啉（TCPP）和N-（4-氨丁基）-N-乙基异鲁米诺（ABEI）制备的新型纳米发光体，其在水溶液中以HO和KSO作为共反应剂表现出独特的电位分辨多色ECL发射。获得了三个ECL峰，458 nm处的ECL-1、686 nm处的ECL-2和529 nm处的ECL-3，其峰电位分别为1.05、-1.65和-1.85 V，分别归因于纳米发光体中ABEI、TCPP和TiO部分的ECL发射。首次在水溶液中观察到纳米发光体的电位分辨多色ECL。它开辟了纳米发光体多色ECL的新研究领域，这在从基础研究到实际应用的ECL领域具有重要意义。
