The combination of π-conjugated fluorophores within a hybrid system gives rise to a triphenylamine-functionalized material [Zn(bpba)(NO ₃ )] ( 1 ) (Hbpba = 4-(bis(4-(pyridin-4-yl)phenyl)amino)benzoic acid).

This review focuses on recent developments on the luminescent triphenylamine-based MOFs for the efficient detection of nitroaromatic compounds (NACs).

From the perspective of the proton conduction mechanism, there is a general notion that effective hydrogen bonding plays a key role in the high conductivity of crystalline proton conductive materials. In order to create more effective hydrogen bond networks resulting in high proton conduction, two hydrogen-bonded supramolecular lanthanide complexes based on imidazole dicarboxylate, {[Ln(m-FPhH₂IDC)₂(H₂O)₆]·(m-FPhH₂IDC)·xH₂O}_n (x = 6, Ln = Eu (1); x = 13, Ln = Dy (2)) (m-FPhH₃IDC = 2-(m-fluoro)phenyl-4,5-imidazole dicarboxylic acid), have been synthesized. AC impedance analysis shows that the optimized proton conductivity of 1 can reach up to 1.34 × 10⁻⁴ S cm⁻¹ at 100 °C and 98% relative humidity (RH), which is 17 times higher than that of 2 (7.82 × 10⁻⁶ S cm⁻¹). The proton conducting mechanisms have been investigated using structural analysis and E_a values. This comparative study of proton conduction between the two lanthanide complexes provides new insight for better understanding the design and development of new proton conductive metal–organic complexes with high proton conductivity.

To develop new types of crystalline proton conducting materials for fuel cells, a polyoxometalate-based hydrogen-bonded organic framework (PHOF) based on Keggin-type [PMo₁₂O₄₀]³⁻ and phenylimidazole (PHOF 1) has been prepared.