Radical Initiated Hydrosilylation on Silicon Nanocrystal Surfaces: An Evaluation of Functional Group Tolerance and Mechanistic Study

Langmuir : the ACS Journal of Surfaces and Colloids
Zhenyu YangJonathan G C Veinot

Abstract

Hydrosilylation is among the most common methods used for modifying silicon surface chemistry. It provides a wide range of surface functionalities and effective passivation of surface sites. Herein, we report a systematic study of radical initiated hydrosilylation of silicon nanocrystal (SiNC) surfaces using two common radical initiators (i.e., 2,2'-azobis(2-methylpropionitrile) and benzoyl peroxide). Compared to other widely applied hydrosilylation methods (e.g., thermal, photochemical, and catalytic), the radical initiator based approach is particle size independent, requires comparatively low reaction temperatures, and yields monolayer surface passivation after short reaction times. The effects of differing functional groups (i.e., alkene, alkyne, carboxylic acid, and ester) on the radical initiated hydrosilylation are also explored. The results indicate functionalization occurs and results in the formation of monolayer passivated surfaces.

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Citations

Apr 8, 2016·ACS Applied Materials & Interfaces·Minjia HuJillian M Buriak
May 20, 2016·Journal of the American Chemical Society·Tapas K PurkaitJonathan G C Veinot
Jul 2, 2016·Journal of the American Chemical Society·Aleksandr V ZhukhovitskiyJeremiah A Johnson
Apr 12, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Morteza JavadiJonathan G C Veinot
Oct 3, 2018·Nanoscale·Christopher Jay T RobidilloJonathan G C Veinot
May 14, 2021·ACS Applied Materials & Interfaces·I Teng CheongJonathan G C Veinot
Jun 26, 2018·Chemical Reviews·Chryssostomos ChatgilialogluVitaliy I Timokhin
Apr 3, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Julian KehrleBernhard Rieger
Aug 31, 2017·ACS Applied Materials & Interfaces·Aleksandrs MarininsIlya Sychugov
May 15, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Christopher Jay T RobidilloJonathan G C Veinot
Aug 16, 2019·ACS Applied Materials & Interfaces·Christopher Jay T RobidilloJonathan G C Veinot
Nov 6, 2021·Journal of the American Chemical Society·Zhujun HuangXiangcheng Pan

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