Distyryl boradiazaindacemes as red and nir switches

Download

index.pdf

Date

2007

Author

İşbaşar, Güllü Ceyda

Metadata

Show full item record

Item Usage Stats

205
views

85
downloads

Two novel distyryl-boradiazaindacene dyes with dimethylaminophenyl and pyridyl appendages, display opposite spectral shifts on protonation with trifluoroacetic acid in organic solvents. This bidirectional switching of the dyes can be shown to be directly related to ICT donor and acceptor characteristics of the dyes. Thus, it has been demonstrated that the switching behavior of the red to NIR emitting dyes can be altered by simple structural modifications.

URI

http://etd.lib.metu.edu.tr/upload/3/12608419/index.pdf
https://hdl.handle.net/11511/16877

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Bidirectional switching of near IR emitting boradiazaindacene fluorophores Deniz, Erhan; Isbasar, G. Ceyda; Bozdemir, Oe. Altan; YILDIRIM, LEYLA; Siemiarczuk, Aleksander; AKKAYA, Engin Umut (2008-08-21) Two novel distyryl-boradiazaindacene dyes with dimethylaminostyryl and pyridylethenyl substituents display opposite spectral shifts on protonation with TFA in organic solvents. This bidirectional switching of the dyes can be shown to be directly related to ICT donor and acceptor characteristics of the substituents attached to the BODIPY core. The observed spectral response of these dyes could be very useful in the design of novel NIR fluorescent ratiometric probes for pH.
Miscibility of methylmethacrylate-co-methacrylic acid polymer with magnesium, zinc, and manganese sulfonated polystyrene ionomers Alkan, C; Yurtseven, N; Aras, L (2005-01-01) The miscibility of methyl methacrylate-co-methacrylic acid polymer (MMA-MAA) with metal neutralized sulfonated polystyrene ionomers was investigated by viscometry, differential scanning calorimetry (DSC), and Fourier transform infrared radiation spectroscopy (FTIR) techniques. Polystyrene (PS) was sulfonated by acetic anhydride and sulfuric acid and the sulfonation degree was found to be 2.6 mole percent, and 2.6 mole percent sulfonated polystyrene was neutralized by Mg, Zn, and Mn salts. The miscibility be...
Synergistic effect of boron containing substances on flame retardancy and thermal stability of intumescent polypropylene composites Yılmaz, Ayşen; BAYRAMLI, ERDAL (2010-12-01) The synergistic effect of four different boron containing substances, zinc borate (ZnB), borophosphate (BPO4), boron silicon containing preceramic oligomer (BSi) and lanthanum borate (LaB), were studied to improve the flame retardancy of a polypropylene (PP) intumescent system composed of ammonium polyphosphate (APP) and pentaerythritol (PER). The flame retardancy of PP composites was investigated by limiting oxygen index (LOI). UL-94 standard, thermogravimetric analysis (TGA) and cone calorimeter tests. Th...
Bactericidal and in vitro osteogenic activity of nano sized cobalt-doped silicate hydroxyapatite Alshemary, Ammar Z.; Hussain, Rafaqat; Dalgic, Ali Deniz; Evis, Zafer (2022-10-01) Hydroxyapatite (HA) particles with enhanced antibacterial properties can be prepared by integrating metal ions into the crystal structure of the nanoparticles. Cobalt and silicate ions containing HA (Co/Si-HA) with the formula Ca10-xCox(PO4)6-y(SiO4)y(OH)2 (x = 0.2, 0.6, and 1.0 and y = 0.5) was successfully synthesised by using microwave-assisted wet precipitation method. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and inductively coupled...
Dual type complementary colored polymer electrochromic devices utilized by 3-ester substituted thiophenes CAMURLU, P; Çırpan, Ali; Toppare, Levent Kamil (Elsevier BV, 2004-10-15) Dual type polymer electrochromic devices (ECDs) based on potentiodynamically coated films of octanoic acid 2-thiophen-3-yl-ethyl ester (OTE), decanedioic acid bis-(2-thiophen-3-yl-ethyl) ester (DATE) and ethylene dioxythiophene (EDOT) were constructed. The former two function as anodically coloring layers and the latter as a cathodically coloring layer in between tetrabutylammonium tetrafluoroborate (TBAFB) poly(methylmethacrylate) gel media. The spectroelectrochemistry, switching ability and stability of t...

Citation Formats

G. C. İşbaşar, “Distyryl boradiazaindacemes as red and nir switches,” M.S. - Master of Science, Middle East Technical University, 2007.