Detail of "977-96-8"

Reference

Optical and electrical properties of organic dye crystals

Optical and electrical properties of organic dye crystals. Final report. Eckhardt, C. J. (Dep. Chem., Univ. Nebraska, Lincoln, NE, USA). Report, DOE/ER/10535-T1; Order No. DE84014930, 7 pp. Avail. NTIS From: Energy Res. Abstr. 1984, 9(18), Abstr. No. 35907 (English) 1984. DOCUMENT TYPE: Report CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 75 Crystal spectra of 3,3'-diethylthiacyanine bromide [17095-31-7], pseudoisocyanine [977-96-8] and 2,4-bis(2-hydroxy-4-diethylaminophenyl)-1,3-cyclobutadienediylium- 1,3-diolate (I) [94344-15-7]. Polymorphs were discovered for the latter two dyes and their spectra were investigated. I showed markedly different spectra for its monoclinic and triclinic forms. The specular reflection spectra of the two crystal forms were successfully fit using mol. exciton-polariton theory employing lattice sums based on a point-charge approxn. A 3-oscillator model for a Gaussian frequency-dependent damping was successful in fitting the spectra. The thiacyanine and pseudoisocyanine dye crystals showed normal quasi-metallic reflection spectra. That of the thiacyanine closely resembled the H-band (dimer) spectra of the dye aggregate in soln.

Nitrogen 1s binding energy shifts detected from a homologous series of cyanine dyes

Nitrogen 1s binding energy shifts detected from a homologous series of cyanine dyes. Gold, L.; Giuliani, J. F. (Chem. Div., Nav. Res. Lab., Washington, DC 20375, USA). J. Am. Chem. Soc., 106(7), 2209-10 (English) 1984. CODEN: JACSAT. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 76 Study of a series of sym. 977-96-8 and 605-91-4 which are cas registry numbers of substances are two of reagents here. cyanine dyes by ESCA in conjugation with electronic absorption spectrometry shows that the principal electronic absorption band shifts with conjugation are directly reflected in the delocalization of the nitrogen (1s) core electrons in which the binding energy decreases linearly with increasing conjugation. The decrease in nitrogen (1s) binding energy with increasing dye conjugation reflects a greater delocalization of charge over the entire dye mol., and hence an increased probability for electronic and optical cond. .