TY - JOUR
T1 - Light-induced self-assemblies suitable for photodimerization and their light-induced [2+2] cycloaddition
T2 - Light as a control factor of crystal growth
AU - Poong, Jung In
AU - Koo, Hyo Geun
AU - Park, Hyun Min
AU - Jang, Seung Pyo
AU - Lee, Yu Jin
AU - Kim, Cheal
AU - Kim, Sung Jin
AU - Kim, Youngmee
PY - 2011/10/1
Y1 - 2011/10/1
N2 - The reaction of Cd(NO3)2 and CF3COONH 4 with bpe (trans-1,2-(bis(4-pyridyl)ethene)) ligands was investigated for a light-induced solid-state [2+2] cycloaddition reaction. The three structures (1 [Cd(bpe)2(CF3COO)2] n, 2 [Cd(bpe)2(NO3)2]n, and 3 [Cd(NO3)(μ-NO3)(H2O)(bpe) 1.5]n) formed in light while only compound 1 (or 1-dark) was formed in the dark. All three compounds were completely transformed to the final [2+2] cycloaddition products containing rctt-tetrakis(4-pyridyl) cyclobutane (rctt-tpcb; rctt means regional cis, trans, and trans of the four pyridyl groups attached to the cyclobutane ring) in solution under a natural light after 4 weeks. Among the final products, only one 3-D structure (4 [{Cd(rctt-tpcb)2(NO3)2}{Cd(rctt-tpcb) 2(OH)2}]n) with a good crystallinity was determined by the X-ray diffraction technique. These observations were also in line with the spectroscopic results such as 1H NMR. Meanwhile, 3 was also prepared separately and exposed to natural light. X-ray and NMR studies showed that 3 was completely transformed to 4 containing rctt-tpcb by a light-induced cycloaddition reaction for the 4 weeks. The reaction progress was further monitored by fluorescent spectroscopy. 1-dark also underwent the solid-state [2+2] cycloaddition under the natural light over four weeks.
AB - The reaction of Cd(NO3)2 and CF3COONH 4 with bpe (trans-1,2-(bis(4-pyridyl)ethene)) ligands was investigated for a light-induced solid-state [2+2] cycloaddition reaction. The three structures (1 [Cd(bpe)2(CF3COO)2] n, 2 [Cd(bpe)2(NO3)2]n, and 3 [Cd(NO3)(μ-NO3)(H2O)(bpe) 1.5]n) formed in light while only compound 1 (or 1-dark) was formed in the dark. All three compounds were completely transformed to the final [2+2] cycloaddition products containing rctt-tetrakis(4-pyridyl) cyclobutane (rctt-tpcb; rctt means regional cis, trans, and trans of the four pyridyl groups attached to the cyclobutane ring) in solution under a natural light after 4 weeks. Among the final products, only one 3-D structure (4 [{Cd(rctt-tpcb)2(NO3)2}{Cd(rctt-tpcb) 2(OH)2}]n) with a good crystallinity was determined by the X-ray diffraction technique. These observations were also in line with the spectroscopic results such as 1H NMR. Meanwhile, 3 was also prepared separately and exposed to natural light. X-ray and NMR studies showed that 3 was completely transformed to 4 containing rctt-tpcb by a light-induced cycloaddition reaction for the 4 weeks. The reaction progress was further monitored by fluorescent spectroscopy. 1-dark also underwent the solid-state [2+2] cycloaddition under the natural light over four weeks.
KW - Coordination polymers
KW - Photodimerization
KW - Self-assembly
KW - X-ray crystal structures
UR - https://www.scopus.com/pages/publications/80052832187
U2 - 10.1016/j.ica.2011.07.042
DO - 10.1016/j.ica.2011.07.042
M3 - Article
AN - SCOPUS:80052832187
SN - 0020-1693
VL - 376
SP - 605
EP - 611
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -