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 TiO₂ nanoparticles (TiO₂-TCPP-ABEI), which exhibited unique potential-resolved multicolor ECL emissions using H₂O₂ and K₂S₂O₈ 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 TiO₂ 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.

中文翻译：

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N-（4-氨基丁基）-N-乙基异鲁米醇/四（4-羧苯基）卟啉/ TiO ₂纳米荧光体的电位分辨多色电化学发光

大多数电化学发光（ECL）研究涉及具有独特发射过程的单个发光体，这严重限制了其应用。最近，多色ECL引起了人们的极大兴趣。本文中，我们报道了通过在TiO ₂的表面上涂覆5,10,15,20-四（4-羧基苯基）-卟啉（TCPP）和N-（4-氨基丁基）-N-乙基异鲁米诺（ABEI）制备的新型纳米发光体纳米颗粒（TiO ₂ -TCPP-ABEI），使用H ₂ O ₂和K ₂ S ₂ O ₈表现出独特的势能分辨多色ECL发射在水溶液中作为共反应剂。获得三个ECL峰，分别为458 nm的ECL-1、686 nm的ECL-2和529 nm的ECL-3，峰值电势分别为1.05，-1.65和-1.85 V，这归因于ECL的发射纳米发光体的ABEI，TCPP和TiO ₂部分。首次在水溶液中观察到了来自纳米发光体的电位分辨多色ECL。它为纳米发光体的多色ECL开辟了一个新的研究领域，这在从基础研究到实际应用的ECL领域都具有重要意义。