Calixarene assembly with enhanced photocurrents using P(SNS-NH2)/CdS nanoparticle structure modified Au electrode systems
Sayin, Serkan and Azak, Hacer and Yildiz, Huseyin Bekir and Camurlu,
Pinar and Akkus, Gulderen Uysal and Toppare, Levent and Ersoz, Mustafa
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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 eefficiently 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.... Show more Show less