TY - JOUR
T1 - Möhlau's anthradipyrazole revisited
T2 - A new look at an old molecular system
AU - Maspero, Angelo
AU - Giovenzana, Giovanni B.
AU - Masciocchi, Norberto
AU - Palmisano, Giovanni
AU - Comotti, Angiolina
AU - Sozzani, Piero
AU - Bassanetti, Irene
AU - Nardo, Luca
PY - 2013/11/6
Y1 - 2013/11/6
N2 - Two polymorphs of 2,7-dihydrobenzo[1,2,3-cd:4,5,6-c′d′] diindazole ("dipyrazoloanthracene"; α and β; DBDI) were isolated and fully characterized by means of structural X-ray powder diffraction methods, thermal, and extended spectroscopic analyses. Different interconversion paths between the two species were evidenced. UV-vis absorption, emission, and excitation spectra were measured, while time-resolved fluorescence studies allowed for the detection of multiple decay processes. In the two species, NH···N hydrogen bonds give rise to manifestly different structures, which, in the rhombohedral β phase, generate permanent porosity. This feature has been further characterized by CO2/N2/CH4 sorption isotherms at different temperatures, highlighting a significant selectivity favoring CO2 trapping.
AB - Two polymorphs of 2,7-dihydrobenzo[1,2,3-cd:4,5,6-c′d′] diindazole ("dipyrazoloanthracene"; α and β; DBDI) were isolated and fully characterized by means of structural X-ray powder diffraction methods, thermal, and extended spectroscopic analyses. Different interconversion paths between the two species were evidenced. UV-vis absorption, emission, and excitation spectra were measured, while time-resolved fluorescence studies allowed for the detection of multiple decay processes. In the two species, NH···N hydrogen bonds give rise to manifestly different structures, which, in the rhombohedral β phase, generate permanent porosity. This feature has been further characterized by CO2/N2/CH4 sorption isotherms at different temperatures, highlighting a significant selectivity favoring CO2 trapping.
UR - http://www.scopus.com/inward/record.url?scp=84887676105&partnerID=8YFLogxK
U2 - 10.1021/cg4011357
DO - 10.1021/cg4011357
M3 - Article
SN - 1528-7483
VL - 13
SP - 4948
EP - 4956
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 11
ER -