Iodine-mediated photo-controlled atom transfer radical polymerization (photo-ATRP) and block polymerization combined with ring-opening polymerization (ROP) via a superbase,Polymer Chemistry

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Iodine-mediated photo-controlled atom transfer radical polymerization (photo-ATRP) and block polymerization combined with ring-opening polymerization (ROP) via a superbase
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020-09-21 , DOI: 10.1039/d0py01031f
Mengmeng Li _{1,

2,

3,

4,

5} , Sixuan Wang _{1,

2,

3,

4,

5} , Feifei Li _{1,

2,

3,

4,

5} , Lin Zhou _{1,

2,

3,

4,

5} , Lin Lei _{1,

2,

3,

4,

5}

Affiliation

Most organocatalysts for photo-controlled atom transfer radical polymerization (photo-ATRP) are metal complexes or synthetically elaborate organic dyes, which are toxic and expensive. Herein, we present a combination of 1,1,3,3-tetramethylguanidine (TMG) and sodium iodide (NaI) under white LED irradiation that could catalyze iodine-mediated photo-ATRP. Using a dual initiator and combining with ring-opening polymerization (ROP), well-defined poly(methacrylate)-b-polyester diblock copolymers can be successfully prepared in “one-pot” using a TMG/NaI photoredox catalytic system. Moreover, several superbases such as 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD), 1,8-diazabicyclo [5.4.0]-undec-7-ene (DBU) and a phosphazene superbase (t-Bu-P₄) could also be employed with NaI to serve as photoredox catalysts for this polymerization system and block copolymers could be synthesized in “one-pot”.

中文翻译：

碘介导的光控原子转移自由基聚合（photo-ATRP）和嵌段聚合与超开环聚合（ROP）结合

用于光控原子转移自由基聚合（photo-ATRP）的大多数有机催化剂是有毒且昂贵的金属配合物或合成精细的有机染料。在这里，我们提出了在白色LED辐射下可以催化碘介导的光ATRP的1,1,3,3-四甲基胍（TMG）和碘化钠（NaI）的组合。使用双引发剂并与开环聚合（ROP）结合，可以使用TMG / NaI光氧化还原催化系统在“一锅法”中成功制备出定义明确的聚（甲基丙烯酸酯）-b-聚酯二嵌段共聚物。此外，几种超碱，例如1,5,7-三氮杂双环[4.4.0]癸-5-烯（TBD），1,8-二氮杂双环[5.4.0]-十一碳七烯（DBU）和磷腈超碱（t -Bu-P ₄也可以与NaI一起用作该聚合体系的光氧化还原催化剂，并且可以“一锅法”合成嵌段共聚物。

更新日期：2020-09-28

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