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Title: Hierarchial coassembly of a cyanine dye in poly(vinyl alcohol) fibrous films by electrospinning
Authors: Demir, Mustafa Muammer
Horzum, Nesrin
Özen, Bengisu
Özçelik, Serdar
Demir, Mustafa Muammer
Horzum, Nesrin
Özen, Bengisu
Özçelik, Serdar
Izmir Institute of Technology. Materials Science and Engineering
Izmir Institute of Technology. Chemistry
Keywords: Electrospinning
Fourier transform infrared spectroscopy
Polyvinyl alcohols
Issue Date: Sep-2013
Publisher: American Chemical Society
Source: Demir, M. M., Horzum, N., Özen, B., and Özçelik, S. (2013). Hierarchial coassembly of a cyanine dye in poly(vinyl alcohol) fibrous films by electrospinning. Journal of Physical Chemistry B, 117(37), 10920-10928. doi:10.1021/jp404977d
Abstract: We report molecular aggregate formation of TTBC (1,1′,3,3′- tetraethyl-5,5′,6,6′-tetrachlorobenzimidazolocarbocyanine) in submicrometer-sized PVA (poly(vinyl alcohol)) fibers by electrospinning. The formation of the molecular aggregate is examined by solution and instrumental parameters of electrospinning. The precursor solution of PVA/TTBC, in the range of 0.016-0.065 wt % is subjected to electrospinning under an electrical field ranging from 0.95 to 1.81 kV cm-1. Both randomly deposited and uniaxially aligned fibers are achieved by using two parallel-positioned metal strips as counter electrode. Photoluminescence and polarized Fourier transform infrared spectroscopies are employed to determine spectral properties of the fibers. H-aggregates are formed within the electrospun fibers, regardless of their alignment, and H- and J-type aggregates coexist in the alternative spin-coated and the cast films. A strongly polarized photoluminescence emission is observed in the direction of uniaxially aligned fibers as a result of the orientation of the H-aggregates along the fiber axis. We demonstrate that electrospinning is a process capable of forming and orienting TTBC aggregates during the structural development of the polymer/dye nanofibers. These fibrous films may potentially find applications in optics and electronics.
ISSN: 1520-6106
Appears in Collections:Chemistry / Kimya
Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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