Carbonate-Terminated Self-Assembled Monolayers for Mimicking Nanoscale Polycarbonate Surfaces

Carbonate-Terminated Self-Assembled Monolayers for Mimicking Nanoscale Polycarbonate Surfaces
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用于模仿纳米级聚碳酸酯表面的碳酸酯封端自组装单分子层

DOI:
10.1021/acsanm.2c04742
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发表时间:
2023
影响因子:
5.9
通讯作者:
Lee, T. Randall
Lee, T. Randall
中科院分区:
材料科学2区
文献类型:
--
作者:
Tajalli, Pooria;Hernandez Rivera, Jennifer M.;Omidiyan, Mina;Tran, Hung-Vu;Lee, T. Randall

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合成了两种具有六元环状碳酸酯基团不同位置异构体的碳酸酯封端烷硫醇分子,3-COC12SH和2-COC12SH,并用于在金上生成自组装单分子层(SAM),以作为市售聚(碳酸亚丙酯)(PPC)和聚(碳酸亚乙酯)(PEC)表面的模拟物。使用 1 H 和 13 C 核磁共振波谱和高分辨率质谱对吸附物分子进行表征。金上相应的 SAM 通过椭圆测量、接触角测角、偏振调制红外反射吸收光谱和 X 射线光电子能谱进行了表征。接触角数据表明,对于各种接触探针液体,两个 SAM 的润湿性彼此之间以及与 PEC 样品的润湿性非常相似(水与 PEC 和两个 SAM 的相关性特别好)。总体而言,润湿性数据表明碳酸酯封端的 SAM 可以作为纳米级聚碳酸酯表面的模拟物,并且可用于研究聚碳酸酯的界面特性,而不受表面重建的干扰。
Two carbonate-terminated alkanethiol molecules having different positional isomers of a six-membered cyclic carbonate group,3-COC12SHand2-COC12SH, were synthesized and used to generate self-assembled monolayers (SAMs) on gold to serve as mimics of the surfaces of commercially available poly(propylene carbonate) (PPC) and poly(ethylene carbonate) (PEC). The adsorbate molecules were characterized using1H and13C nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry. The corresponding SAMs on gold were characterized by ellipsometry, contact angle goniometry, polarization-modulation infrared reflection-adsorption spectroscopy, and X-ray photoelectron spectroscopy. The contact angle data showed that the wettabilities of both SAMs were largely similar to each other and to the PEC samples for a wide range of contacting probe liquids (with water correlating particularly well with PEC and both SAMs). As a whole, the wettability data suggest that the carbonate-terminated SAMs can serve as mimics of nanoscale polycarbonate surfaces and can be used to investigate the interfacial properties of polycarbonates without interference from the surface reconstruction.
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