Perfectly isoselective polymerization of 2-vinylpyridine promoted by β-diketiminato rare-earth metal cationic complexes

Abstract

Highly isotactic poly(2-vinylpyridine)s were produced with rare-earth metal complexes supported by a symmetric β-diketiminate ligand in the presence of borate.

β‐Diketiminato Rare‐Earth Metal Complexes: The Influence of Monoatomic Substituents in the N‐aryl Moieties on Structures and Properties

“…Compared with our previous report, the dialkyl complexes 3 with clorine substituent can polymerize 200 equiv. of 2‐VP quantitatively within 10 min at ambient temperature with somewhat lower turnover frequencies (TOFs) of 1188 ( 3a ) and 1176 ( 3b ).…”

“…In continuation of our studies on β‐diketiminato rare‐earth metal complexes and stereospecific polymerization of 2‐vinylpyridine (2‐VP), in this study we report the influence of monoatomic substituents (H, F and Cl) in the N‐aryl moieties on structures of rare‐earth metal complexes. In addition, the catalytic performance of dialkyl complexes for the polymerization of 2‐VP was presented.…”

Metal Complexes as Catalysts/Moderators for Polymerization Reactions

“…Recent reports highlighted the efficiency of rare-earth metal complexes of various ligand architectures (2.21-2.26, Figure 2.8) for the highly isotactic or syndiotactic polymerization of the challenging 2-vinylpyridine, which cannot easily be achieved via other polymerization techniques. [40][41][42][43][44] In a very recent review, Marks and coworkers also provided a comprehensive state of the art, including (pre)catalysts structures, range of applications (monomers) and mechanistic considerations, of the copolymerization of olefins and polar monomers mediated by early transition metal-based catalysts (rare-earth and Group 4 metals). 45 In complement to the present section, interested readers may refer to more specific and detailed reviews dealing with the use of rare-earth metal complexes in coordination polymerization.…”

Template‐Assisted Regioselective Identification of Metal Ions on Coumarin‐Furan Conjugated Chemosensors: AIEE Effect and Photo‐Switching pH Indicator by ICT

“…On the other side, R2 has been made by the reaction between two equivalents of aniline and furan 2,5-dicarboxylaldehyde in a similar fashion (Scheme 1). Both the chemosensors were successfully obtained in good yield and well-characterized by 1 H-NMR, 13 C-NMR, LC-MS, and FT-IR. Photophysical studies were carried out in UV/Visible and fluorescence spectrophotometer.…”

“…Aggregation-induced emission enhancement (AIEE) is one of the hottest topics in current research, and it has been broadly studied because of the promising applications in organic, supramolecular, medicinal, and material chemistry. [1] The AIEE based molecules are used in real-time applications such as organic light-emitting diodes, [2,3] chemosensors, [4][5][6] fluorescent bio-probes, [7][8][9] heavy and noxious metal ions sensors, [10][11][12] catalysts, organic molecular transformations, [13] etc.…”