Interpenetration of Donor–Acceptor Hybrid Frameworks for Highly Sensitive Thermal Sensors

Donor–acceptor (D–A) alignment that integrates D–A
pairs into the modular and versatile crystalline metal–organic
frameworks is a powerful strategy to precisely fabricate multifunctional
materials with unique optoelectronic properties and applications at
the molecular level. Herein, we reported an unprecedented threefold
interpenetrating D–A hybrid framework by incorporating an electron-deficient
linear viologen zwitterion into the lead-halide systems. The 1D iodoplumbate
nanoribbon and interpenetrating close-packed D–A structure
endowed this hitherto unknown semiconductive alignment with the anisotropic
conductivity and high stability. When used in a thermal sensor, it
presented exceptional electrical properties with a high sensitivity
(high thermal index B of 4671 K) and decent temperature
coefficient of resistivity (0.72% °C–1) in
wide operational temperature ranges (40–220 °C), which
are among the best of the related thermistors. This work develops
a pathway to bridge the gaps between hybrid materials and electron
devices.