Synthesis and Characterization of Novel AB and ABA Rod–Coil Block Copolymers

Synthesis of a New Macroperoxy Initiator with Methyl Methacrylate and T-Butyl Peroxy Ester by Atom Transfer Radical Polymerization and Copolymerization with Conventional Vinyl Monomers

“…Macrointermediates such as macroinitiators, macromonomers, macrocrosslinkers are important in polymer modification leading to block and graft copolymers (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18). Macromonomeric initiators which behave as a macromonomer, macroinitiator, or macrocrosslinker have attracted great interest because they lead to synthesized crosslinked or branched block copolymers.…”

Variety of polymorphic forms contrasted with uniform crystal packing in sparteine ML2 complexes: Crystal structure, spectroscopic and magnetic properties of (−)-α-isosparteine and (−)-sparteine complexes with CuBr2

“…So far such similarity in packing has been limited to a series of sparteine complexes where either metal ion or monodentate ligands have been replaced, but has not been observed in cases where the (À)-sparteine ligand has been substituted by either the (À)-a-iso-or the b-isosparteine isomer. 1 It also follows from Table 2 that the reported polymorph 2 occupies the space most effectively. It has a density and the Kitajgorodsky packing index (KPI, PLATON software [40]) significantly higher than the other three polymorphs 2a, 2b, 2c.…”

“…Copper complexes with (À)-sparteine (Sp) display interesting physical, chemical and structural behavior. It has been demonstrated that (À)SpCuBr complex plays an important role in synthesis of novel rod-coil block copolymers [1], (À)SpCuCl 2 complex is a good chiral catalyst in polymerization reaction [2] and sparteine related compounds are successfully used as structure-directing agents to synthesize the molecular sieves with unique structures [3].…”

“…In view of the anti-ferromagnetic properties of some of the known polymorphic forms of (À)SpCuBr 2 complexes [6,8] magnetic properties of (À)-a-isosparteine complex (1) have been also examined. Unfortunately, we could not collect enough quantity of 2 to measure its magnetic susceptibility and thermal stability.…”

“…Displacement ellipsoids are drawn at 40% probability level 1. The three isomers of sparteine differ in the type of fusion of the A/B and C/ D rings and in the conformation of the C-ring.…”