C–H Azidation System Induced by Visible Light from Triboelectric Nanogenerators Based on a Cadmium Coordination Polymer

Utilizing
sustainable and convenient energy from the environment
via triboelectric nanogenerators (TENGs) to achieve photoinduced organic
conversion was an effective but challenging strategy. Herein, we addressed
this challenge by introducing coordination polymers (CPs) into the
TENG for output regulation. A two-dimensional cadmium coordination
polymer (Cd-CP) was synthesized and used as the triboelectric
layer for fabricating TENGs. Due to its well-defined platform as well
as consistent and precise structure, the output of the Cd-CP-based TENG was superior to that of the ligand-based TENG. To clearly
illustrate the influence of the doping ratios of Cd-CP in organic polymers and further improve the output performance of
these TENGs, Cd-CP was associated with different polarities
of ethyl cellulose (EC) and poly(vinylidene fluoride) (PVDF) to produce
a variety of composite films, which were employed as triboelectrodes
to engineer TENGs. The results indicated that the outputs of Cd-CP@EC-TENG exceeded those of Cd-CP@PVDF-TENG at the same doping proportion. In particular, 15% Cd-CP@EC-TENG possessed the best stability and highest outputs to light up white
beads as a visible light source for the photoinduced C–H azidation
reaction in good yields with high tolerance. The design and concept
of this study not only verified that the components of the triboelectric
layer played an important role in tuning TENG outputs but also provided
an efficient pathway to realize photoinduced reactions with operational
simplicity and high yields.