Ultrafast, green and recyclable photoRDRP in an ionic liquid towards multi-stimuli responsive amphiphilic copolymers

Abstract

A simple and inexpensive method on ultrafast and recyclable photoRDRP (in the absence of any conventional pho-toinitiators or dye sensitizers) in ionic liquid is developed, yielding low dispersity poly(glycidyl methacrylate)...

Straightforward synthesis of multifunctional porous polymer nanomaterials for CO2 capture and removal of contaminants

“…MSN-Br was then employed as the initiating site for the synthesis of different mesoporous silica/poly(glycidyl methacrylate) hybrid nanomaterials (MSPGMAN-CH 2 Cl) bearing a pendant –CH 2 Cl functionality via SC-ATRP of glycidyl methacrylate (GMA) in the presence of various quantities of (5, 10 and 15 mol%) a functional monomer, 4-vinylbenzyl chloride (VBC), using a CuCl/CuCl 2 /PMDETA catalytic system at 60 °C (Scheme 1). A representative MSPGMAN-CH 2 Cl hybrid exhibited characteristic bands of Si–O–Si (1060 cm −1 ), 54 –CO of PGMA (1717 cm −1 ), 64 phenyl ring stretching of VBC (1445, 1512 and 1637 cm −1 ), 55 CH 2 of the pendant –CH 2 Cl functionality (1397 cm −1 ) 55 and stretching vibration of C–Cl of the pendant –CH 2 Cl functionality (748 cm −1 ), 55 confirming successful synthesis of MSPGMAN-CH 2 Cl hybrids. TGA analysis of a MSPGMAN-CH 2 Cl-15% (bearing 15% –CH 2 Cl functionality) hybrid revealed 60% polymer in the mesopores of MSN.…”

“…54,63 MSN-Br was then employed as the initiating site for the synthesis of different mesoporous silica/poly(glycidyl methacrylate) hybrid nanomaterials (MSPGMAN-CH 2 Cl) bearing a pendant -CH 2 Cl functionality via SC-ATRP of glycidyl methacrylate (GMA) in the presence of various quantities of (5, 10 and 15 mol%) a functional monomer, 4-vinylbenzyl chloride (VBC), using a CuCl/CuCl 2 /PMDETA catalytic system at 60 °C (Scheme 1). A representative MSPGMAN-CH 2 Cl hybrid exhibited characteristic bands of Si-O-Si (1060 cm −1 ), 54 -CvO of PGMA (1717 cm −1 ), 64 phenyl ring stretching of VBC (1445, 1512 and 1637 cm −1 ), 55…”

An amino acid-derived ABCBA-type antifouling biohybrid with multi-stimuli responsivity and contaminant removal capability

“…A recyclable alloy mediated ambient temperature RDRP process was chosen for the triblock copolymer synthesis as this technique was recently successfully employed by our group for welldefined block copolymer synthesis. [49][50][51][52] The SEC analysis revealed a uniform shift towards higher molecular weights, showing no residue of the dibromo macroinitiator and suggesting the synthesis of the triblock copolymers (Fig. 1).…”

Multi-Stimuli Responsive Sequence Defined Multi-Arm Star Diblock Copolymers for Controlled Drug Release

“…In recent years, because of their unique properties, stimuli-responsive sequence defined − functional materials have drawn a lot of attention for a variety of biotechnological applications, including but not limited to drug and gene delivery, catalysis, MRI contrast agents, tissue engineering, and targeted cell detection. − Compared to single- or dual-stimuli-responsive materials, multi-responsive , molecular materials exhibit improved diversity, fine-tunable stimuli response and physicochemical properties. Light has recently gained a lot of attention among all the various stimuli because it can provide temporal control and precise ON/OFF switching. − However, to date, the existing multi-stimuli-responsive materials are unable to provide the desired specificity and tunability. This might be due to the difficulty in precise control of the functionality, degradability, hydrophilicity, etc.…”

“…Light has recently gained a lot of attention among all the various stimuli because it can provide temporal control and precise ON/OFF switching. 12 − 14 However, to date, the existing multi-stimuli-responsive materials are unable to provide the desired specificity and tunability. This might be due to the difficulty in precise control of the functionality, degradability, hydrophilicity, etc.…”