Calix[2]bispyrrolylarenes: New Expanded Calix[4]pyrroles for Fluorometric Sensing of Anions via Extended π-Conjugation
作者:Brijesh Chandra、Sanjeev P. Mahanta、Narendra N. Pati、Sambath Baskaran、Ravi K. Kanaparthi、Chinnappan Sivasankar、Pradeepta K. Panda
DOI:10.1021/ol3032158
日期:2013.1.18
Two new expanded calix[4]pyrroles 3 and 4 were synthesized by ‘2 + 2’ cyclocoupling of easily prepared diboryldipyrromethane 7 (by Ir-catalyzed CH-bond activation) with appropriate diiodoarenes using the Suzuki protocol. Owing to the unique design, both macrocycles exhibited extended π-conjugation and enhanced fluorescence. Upon complexation with anions (fluoride and acetate), receptor 3 displayed
Expanded nonaromatic stable porphyrins(2.1.2.1) were successfully synthesized by 2,3-di(1H-pyrrol-2-yl)naphthalene as buliding blocks and aromatic aldehydes under acid catalyzed condensation conditions in acceptable isolated yields. NMR, X-ray diffraction analysis, absorption, electrochemical, and density functional theory revealed these macrocycles to be non-aromatic due to highly saddle-shaped molecular
以2,3-二(1H-吡咯-2-基)萘为结构单元和芳香醛在酸催化缩合条件下以可接受的分离收率成功合成了膨体非芳香族稳定卟啉(2.1.2.1)。NMR、X 射线衍射分析、吸收、电化学和密度泛函理论表明,由于二萘卟啉 (2.1.2.1) 的高度马鞍形分子结构,这些大环化合物是非芳香族的。嵌入萘单元的鞍形二萘卟啉(2.1.2.1)为π-共轭单元显示出对分子结构、光学和电子特性的扰动。二萘卟啉 (2.1.2.1) 是有效的大环配体,可产生铜 (II) 和镍 (II) 配合物。
Synthesis of Hybrid Porphyrin(2.1.2.1)s and Their Complexation
Novel hybrid porphyrin(2.1.2.1)s and their boron and copper complexes were synthesized using the “toy bricks” synthetic method. Crystal data, frontier molecular orbital calculations, and electrostatic potential surface maps reveal that hybridization in the porphyrin(2.1.2.1) donor–acceptor unit controls the selective coordination of BF2.