Thanneeru, Srinivas; Li, Weikun; He, Jie published the artcile< Controllable Self-Assembly of Amphiphilic Tadpole-Shaped Polymer Single-Chain Nanoparticles Prepared through Intrachain Photo-cross-linking>, HPLC of Formula: 17082-09-6, the main research area is assembly control amphiphilic tadpole diblock polymer single chain nanoparticle; cinnamoyl crosslinking photochem assembly micelle morphol.
We report the use of intramol. crosslinking chem. as a tool to control the self-assembly of amphiphilic diblock copolymers (di-BCPs). Two amphiphilic di-BCPs of poly(N,N’-dimethylacrylamide)-block-polystyrene (PDMA-b-PS) with photo-cross-linkable cinnamoyl groups in either hydrophobic or hydrophilic blocks were prepared using reversible addition-fragmentation chain transfer polymerization Intramol. photo-crosslinking of cinnamoyl groups led to the formation of tadpole-shaped polymer single-chain nanoparticles (SCNPs) consisting of a self-collapsed block as the “”head”” and an un-cross-linked block as the “”tail””. When intramol. photo-crosslinking was carried out in hydrophobic PS blocks, a clear morphol. transition from branched cylindrical micelles (for the linear di-BCP) to completely spherical micelles at a dimerization degree of ∼63% was observed A pattern of morphol. transitions from cylindrical micelles to spherical micelles is observed through stepwise downsizing the length of cylindrical micelles when increasing the self-collapse degree of PS blocks, whereas, in case of photo-crosslinking carried out in hydrophilic PDMA blocks, the size of micelles showed a dramatic increase due to the shift of hydrophobic-to-hydrophilic balance. When the crosslinking degree of PDMA blocks reached >60%, tadpole-shaped SCNPs assembled into nonconventional aggregates with a nonsmooth surface. Our results illustrate the impact of chain topologies on the self-assembly outcomes of amphiphilic di-BCPs, which likely opens a door to control the micellar morphologies from just one parent linear di-BCP, rather than resynthesizing BPCs with different volume fractions of the two blocks.
Langmuir published new progress about [2+2] Photocycloaddition reaction. 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, HPLC of Formula: 17082-09-6.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics