- Structure determination from powder X-ray diffraction data of black azo (hydrazone) pigments
-
Crystal structures of two black monoazo (hydrazone) pigments have been determined from powder X-ray diffraction data combined with DFT calculations. The DFT calculations suggested the molecules are in hydrazone forms but not in azo forms in both crystal structures. The molecular arrangements in the crystal structures suggested Davydov splitting may occur by excitonic interactions and it causes the red absorption band shift in the crystalline state leading to the characteristic black colors.
- Otani, Junji,Matsumura, Michio,Fujii, Kotaro,Uekusa, Hidehiro
-
supporting information
p. 662 - 664
(2015/05/27)
-
- MONOAZO COMPOUND AND METHOD FOR PRODUCING SAME
-
The present invention provides a monoazo compound represented by formula (1) or a salt thereof: wherein, Y1 and Y2 represent a group selected from hydrogen atom, formula (2) and formula (3); ????????-CO-E-X?????(3) provided that at least one of Y1 and Y2 is a group represented by formula (2); Z is a group selected from formulae (4), (5) and (6);
- -
-
Page/Page column 9-10
(2008/06/13)
-
- Synthesis and biological activities of new 1,4-benzothiazine derivatives
-
New 2H-1,4-benzothiazin-3(4H)-one derivatives possessing (4-phenyl-1-piperazinyl)alkyl moieties at the 2-position were synthesized and tested for calcium antagonistic and calmodulin antagonistic activities. Antihypertensive effects in spontaneously hypertensive rats were also evaluated. In general, these compounds were rather weak calcium channel blockers, although, in contrast, many of them had moderate to potent calmodulin antagonistic activity, and 2-[3-(4-(4-fluorophenyl)-1-piperazinyl]propyl]-2H-1,4-benzothiazin-3(4H )-one derivatives 45, 74 and 75 showed potent antihypertensive effects.
- Kajino,Mizuno,Tawada,Shibouta,Nishikawa,Meguro
-
p. 2888 - 2895
(2007/10/02)
-