Fabrication of Oxidative and pH Dual-Responsive Photonic Crystals Based on Sulfide-Containing Block Copolymers
Fabrication of Oxidative and pH Dual-Responsive Photonic Crystals Based on Sulfide-Containing Block Copolymers
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基于含硫化物嵌段共聚物的氧化和 pH 双响应光子晶体的制备
DOI：
10.1021/acsapm.1c01870
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发表时间：
2022-04
影响因子：
5
通讯作者：
朱健
中科院分区：
文献类型：
--
作者：
徐斌;潘向强;朱健
由响应性聚合物衍生的光子晶体在外界刺激下具有可调的光子带隙，在不同领域有着广泛的应用。本文以苯基乙烯基硫醚(PVS)和N，N‘-(二甲氨基)丙烯酸乙酯(DMAEA)为功能单体，采用可逆加成-断裂链转移(RAFT)聚合方法合成了氧化-pH双响应型共聚物。氧化响应性PVS链段产生折射率(RI)变化的共聚物，pH响应性DMAEA链段产生聚集态距离变化的共聚物。用这些共聚物制备的聚碳酸酯具有独特的双响应行为，例如，在不同的氧化和pH条件下，聚碳酸酯的反射峰出现了不同程度的蓝移。本文报道了一种由S-硫化乙烯基衍生物衍生的高折射率聚合物，其中的折射率通过选择氧化而改变，并且当这些衍生物与二甲基亚乙基乙二胺单元结合时，观察到了双响应。由于光子晶体的阻抗和周期距离的变化，成功地实现了PC带隙的可预测变化，从而实现了双响应型PC传感器。
Photonic crystals (PCs) derived from responsive polymers exhibit adjustable photonic band gaps under external stimuli, and they have abundant applications in different fields. Herein, oxidative and pH dual-responsive copolymers were synthesized using reversible addition–fragmentation chain transfer (RAFT) polymerization with a functional monomer of combined phenyl vinyl sulfide (PVS) andN,N′-(dimethylamino) ethyl acrylate (DMAEA). The oxidatively responsive PVS segment generated copolymers with a refractive index (RI) change, and the pH-responsive DMAEA segment generated copolymers with a distance change in the aggregation state. Fabricating PCs with these copolymers resulted in unique dual-responsive behavior, e.g., the reflective peaks of PCs exhibited blue shifts to varying degrees under different oxidative and pH conditions. This report presents a high refractive index polymer derived from S-vinyl sulfide derivatives, in which the refractive index changed through selective oxidation and dual responsiveness was observed when the derivatives were combined with DMAEA units. Owing to changes in the RI and the period distance in PCs, a predictable change in the band gap of PCs for the aim of realizing a dual-responsive PC sensor was successfully obtained.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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