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Akademisyenler > Emine Esra KASAPBAŞI > Yayın Detayı

A Contoured Nanoporous Network of Anionic Trimesic Acids on Au 111 and Its Host Guest Chemistry      
Yazarlar (5)
Jandee Kim
Chungnam National University, Güney Kore
Choong K. Rhee
Chungnam National University, Güney Kore
Hyun-J. Koo
Kyung Hee University, Güney Kore
Prof. Dr. Emine Esra KASAPBAŞI Prof. Dr. Emine Esra KASAPBAŞI
İstanbul Aydın Üniversitesi, Türkiye
Myung-H. Whangbo
Nc State University, Amerika Birleşik Devletleri
Devamını Göster
Özet
This work describes a trimesic acid (TMA) network formed at the open-circuit potential (OCP, ∼0.13 V) on Au(111), which we investigate with electrochemical scanning tunneling microscopy (STM). The unit cell of the TMA network at the OCP was (5√3 × 5√3)R30-4TMA, while that of a well-known honeycomb network of flat-lying TMAs at-0.1 V was (6 × 6)R30-2TMA. The most significant difference between the two networks is the fraction of hydrogen bonds appearing as bright spots in the STM images: it is 1/3 in the former but 1 in the latter. Additional differences were the shapes and lengths of the STM spots and the packing density of TMAs. A contoured network composed of crownlike anionic TMA hexamers was proposed to explain all the differences. The TMAs in the crownlike hexamer were rotated along the molecular axis and were tilted up from the surface by ∼30 to have hydrogen bonds with reasonable O-H···O distance, and the hexamers were interconnected to a contoured network. The existence of the anionic TMA hexamer was evidenced by selective host-guest interaction of Cu2+ ions and 1-mercaptohexane with the contoured network. At a higher potential than the OCP, simple arrays of anionic TMA dimers with much higher packing densities were observed, depending on the availability of TMAs from solution. The potential dependence of the structure of the TMA adlayer is discussed in terms of a transition from molecular adsorption to anionic adsorption. © 2013 American Chemical Society.
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Journal of Physical Chemistry C
Dergi ISSN 1932-7447 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SSCI
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 01-2013
Cilt No 117
Sayı 44
Sayfalar 22636 / 22643
DOI Numarası 10.1021/jp403203s
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
WoS 3
SCOPUS 3
Google Scholar 3
A Contoured Nanoporous Network of Anionic Trimesic Acids on Au 111 and Its Host Guest Chemistry

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