Characterization and application of self-assembly porphyrin with four "clips" on gold surface

Jiandong Yang, Minrui Li, Hongxiang Li, Yanlian Yang, Yoshiaki Kashimura, Chen Wang, Keiichi Torimitsu, Xiaoquan Lu, Wenping Hu

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Self-assembled monolayers (SAMs) of thiol-derivatized porphyrin molecules on Au substrate have attracted extensive interest for use in sensing, molecular recognition, and molecular electronics. Here, we synthesized tetra[p-(3-mercaptopropyloxy)phenyl]porphyrin (PPS4) with four "clips" for SAMs. The results demonstrated that PPS4 could form excellent SAMs on gold surface wherein the molecules oriented on substrates with a tilted angle. Self-assembled nanojunctions of PPS4 were fabricated by using gold nanogap electrodes (gap width: ca. 100 nm), which exhibited nonlinear current-voltage characteristics, indicating tunneling injection of current from Au electrodes into PPS4. With the light on/off, the nanojunctions switched between low/high impedance states as nanometer scaled photoswitchers.

Original languageEnglish
Pages (from-to)12320-12324
Number of pages5
JournalJournal of Physical Chemistry C
Issue number28
Publication statusPublished - 2010 Jul 22


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