Spectroscopic behaviour of malachite green in sol-gel glasses

Polypyrrole nanofiber–carbon nanotube electrodes for supercapacitors with high mass loading obtained using an organic dye as a co-dispersant

“…Literature data indicated that such peaks were observed in the spectrum of MG-OH. 31,32 Therefore, the UV-Vis data conrmed that MG species were incorporated in the deposits as MG-OH in agreement with eqn (2).…”

“…It is suggested that the charge neutralization of cationic MG resulted in the formation of MG base 31,32 (MG-OH) at the cathode surface:…”

“…The UV-Vis spectrum of asreceived MG showed absorptions at 616, 427 and 316 nm in agreement with the literature data. 32,35 The spectra of deposited MWCNTs and PPy showed peaks at 613 and 615 nm, respectively. Such peaks were not observed in the spectra of the as-received MWCNTs and as-prepared PPy.…”

Investigation of common fluorophores for the detection of nitrated explosives by fluorescence quenching

“…The color change and unexpected quenching behavior is believed to be a pH effect, resulting from the addition of the acidic and basic quenchers. Malachite green is known to change color with pH [51], and there is some evidence for a decrease in quantum yield in acidic solution [52]. This decrease in fluorescence power may be considered as a form of trivial quenching, which can be minimized by proper buffering of the solutions.…”

Zirconia and Zirconia−ORMOSIL Planar Waveguides Prepared at Room Temperature

“…The preparation procedure at low temperature allows the incorporation of organic additives that such as laser dyes or indicators into the waveguide. A promising technological application of such waveguides is their use in optical sensors. − The following properties of zirconia-based films make them suitable candidates for use as waveguide sensors: (1) The high refractive index of the films enables their use as waveguides deposited on ordinary glass substrate. (2) In order to use the waveguides for environmental, biological, or industrial sensing purposes, special consideration must be given to the matrix stability to chemical damage in solution.…”