Freytag, Karen published the artcileHybrid single-chain nanoparticles via the metal induced crosslinking of N-donor functionalized polymer chains, Name: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Polymer Chemistry (2017), 8(48), 7546-7558, database is CAplus.
A set of copolymers based on Bu acrylate and 4-vinylpyridine was synthesized with mol. weights ranging from 6000 to 70 000 g/mol and an amount of metal binding sites ranging from 3 to 22 mol%. These organosol. precursors with hydrophobic side chains were treated with Cu2+, Co2+, Ni2+, Zn2+, Fe2+, Mg2+, and Pd2+. The coordination of metal ions to pyridine moieties as versatile N-donors led to intrachain crosslinking and subsequent chain collapse. A set of 34 hybrid single-chain nanoparticles was prepd and their formation was monitored by dynamic light scattering and diffusion ordered NMR spectroscopy. The influence of mol. weight, mol. weight distribution, and amount of binding sites on size reduction during single-chain nanoparticle formation was discussed in the context of models given in the literature. An indication for the dependency of size reduction on the coordinative bond strength was given. Selected crosslinking metal centers were analyzed by theor. investigations. A significant freedom for the coordination geometry which can induce chain collapse was revealed.
Polymer Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Name: 2,5-Dibromo-3,4-dinitrothiophene.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary