Calixarene assembly with enhanced photocurrents using P(SNS-NH2)/CdS nanoparticle structure modified Au electrode systems


SAYIN S., AZAK H., YILDIZ H. B. , ÇAMURLU P., UYSAL AKKUŞ G., Toppare L., ...More

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol.17, no.30, pp.19911-19918, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 30
  • Publication Date: 2015
  • Doi Number: 10.1039/c5cp01932j
  • Journal Name: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.19911-19918
  • Middle East Technical University Affiliated: Yes

Abstract

Two novel calix[n] arene-adorned gold electrodes producing high photocurrent intensities were successfully constructed by embedding gold electrode surfaces with both P(4-(2,5-di(thiophen-2-yl)-1H- pyrrol-1-yl)benzenamine) conducting polymer and 4-mercaptoboronic acid-functionalized semiconductor CdS nanoparticles to facilitate the binding of calix[n]arene sulfonic acids with nanoparticles. This structure enabled an electron transfer cascade that both induced effective charge separation and efficiently generated photocurrent. The prepared electrodes were used to generate photocurrent by relying on the host-guest interactions of guests Br-3(-) and I-3(-), which if positioned well in the system was able to fill electron-hole pairs of CdS nanoparticles. As a result, host calixarene derivatives crucially held Br-3(-) and I-3(-) ions at a substantial distance from CdS nanoparticles. Furthermore, the effects of various calixarenes on the photocurrent obtained indicate that the generation of photocurrent intensities by the system depends on the cavity sizes of calixarene derivatives, which provide an essential center for Br-3(-) and I-3(-) ions.