- 作者: Yea Wenn Liou and Chong Mou Wang*
- 作者服務機構: National Taiwan Normal University, Department of Chemistry, Taipei 116, Taiwan, R.O.C.
- 中文摘要: Chemically modified zeolite Y (NaY) particles and their resulting modified electrodes were prepared with acridinium (AcH+), iron(II) and 1,10-phenanthroline (phen) for energetic studies. According to diffuse reflectance absorption spectroscopy and cyclic voltammetry, AcH+ and Fe(phen)32+ were successfully entrapped in the zeolite particles. Transient emission spectra measurements showed that the lifetime of AcH+* in the zeolite particles (to 35 ns; lex 365 nm; lem 500 nm) was greatly reduced upon incorporating Fe(phen)32+ and Fe2+. The fast decay of AcH+*(NaY) suggested that a reductive quench was likely to take place in the zeolite particle. Probably due to a size-exclusion effect, the bulky electron donor, N,N-diethyl-2-methyl-1,4-phenylene diamine (DEPD), revealed a difficulty in reaching the photosensitizer, AcH+, inside the zeolite particle. As a consequence, the insignificant photocurrent for the oxidation of DEPD was from the NaY|AcH+ electrode. However, if Fe2+ and Fe(phen)32+ were incorporated, the photocurrent would become more significant. Closer examinations, in addition, showed that the photooxidaton of DEPD occurred more rapidly on the NaY|AcH+|Fe(phen)32+ electrode, compared to the NaY|AcH+|Fe2+ electrode. This difference apparently results from a greater gap in energetics between DEPD and Fe(phen)33+(NaY) than that between DEPD and Fe3+(NaY). Due to this effect, a greater amount of indophenol blue, derived from the coupling reaction of the oxidized DEPD with 1-naphthol, was formed and deposited on the NaY|AcH+|Fe(phen)32+ modified electrode. Thanks to this photo-induced charge-transfer reaction, the NaY|AcH+|Fe(phen)32+ particle showed an application potential in image recording.
- 英文摘要: --
- 中文關鍵字: Photo-induced electron transfer; Zeolite-modified electrode; Acridinium; Fe(II) 1; 10-phenanthroline complex.
- 英文關鍵字: Photo-induced electron transfer; Zeolite-modified electrode; Acridinium; Fe(II) 1; 10-phenanthroline complex.