Yang, Eunkyung published the artcileIntegration of Cyanine, Merocyanine and Styryl Dye Motifs with Synthetic Bacteriochlorins, Application In Synthesis of 606-55-3, the publication is Photochemistry and Photobiology (2016), 92(1), 111-125, database is CAplus and MEDLINE.
Understanding the effects of substituents on spectral properties is essential for the rational design of tailored bacteriochlorins for light-harvesting and other applications. Toward this goal, three new bacteriochlorins containing previously unexplored conjugating substituents have been prepared and characterized. The conjugating substituents include two pos. charged species, 2-(N-Et 2-quinolinium)vinyl- (B-1) and 2-(N-Et 4-pyridinium)vinyl- (B-2), and a neutral group, acroleinyl- (B-3); the charged species resemble cyanine (or styryl) dye motifs whereas the neutral unit resembles a merocyanine dye motif. The three bacteriochlorins are examined by static and time-resolved absorption and emission spectroscopy and d. functional theor. calculations B-1 and B-2 have Qy absorption bathochromically shifted well into the NIR region (822 and 852 nm), farther than B-3 (793 nm) and other 3,13-disubstituted bacteriochlorins studied previously. B-1 and B-2 have broad Qy absorption and fluorescence features with large peak separation (Stokes shift), low fluorescence yields, and shortened S1 (Qy) excited-state lifetimes (∼700 ps and ∼100 ps). More typical spectra and S1 lifetime (∼2.3 ns) are found for B-3. The combined photophys. and mol.-orbital characteristics suggest the altered spectra and enhanced nonradiative S1 decay of B-1 and B-2 derive from excited-state configurations in which electron d. is shifted between the macrocycle and the substituents.
Photochemistry and Photobiology published new progress about 606-55-3. 606-55-3 belongs to iodides-buliding-blocks, auxiliary class Quinoline,Salt, name is 1-Ethyl-2-methylquinolin-1-ium iodide, and the molecular formula is C10H15ClO3S, Application In Synthesis of 606-55-3.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com