Sauvik Saha

Cu-based 2D MOFs (p-Cu-THQ and d-Cu-THQ) reveal how porosity affects Li-ion storage, with dense d-Cu-THQ showing higher capacity and rate due to pseudocapacitive behaviour while porous p-Cu THQ offers better cycling stability via improved diffusion.

Bimetallic 2D MOF CuCo-THQ demonstrates efficient HER activity in alkaline media with low overpotential, favourable kinetics, and strong durability. Synergistic Cu–Co interactions enhance the catalytic performance beyond that of Cu-THQ and Co-THQ.

Solid-state photophysical properties of [Ru(bpy)₃]²⁺ are well-studied, whereas those of [Ru(bpy)₃]³⁺ remain elusive. Here, we report ambient-conditions stabilization of [Ru(bpy)₃]³⁺ in an organic-inorganic hybrid crystal, [Ru(bpy)₃]₂Ag₆Br₁₂. Utilizing two-dimensional hexagonal anionic network, (Ag₆Br₁₁)_n^5n-, featuring strong argentophilic interactions, this system stabilizes the spin-bearing low-spin d⁵ Ru(III) exhibiting unusual room-temperature photoluminescence with three emission peaks (~586, ~612, and ~686 nm), a behavior rarely seen in ruthenium tris(bipyridine) systems. Temperature-dependent and time-resolved photoluminescence measurements reveal average lifetimes of ~10 ns at 300 K across all peaks. The origin of the three emission peaks is identified by time-dependent density functional theory calculations, revealing three doublet ligand-to-metal charge-transfer states to a doublet ground state transitions. The extracted spin-density plot suggests near spin-degeneracy of the d_z², d_x²_-y² and d_xy orbitals, corroborating trigonal antiprismatic (D_3d) microsymmetry. The organic-inorganic hybrid also displays ultralow thermal conductivity (~0.21 W·m^-1·K^-1 at 480 K), qualifying it as a promising multifunctional material.

Azobenzene-based lanthanide MOF thin films fabricated via electrodeposition exhibited a unique thermally-driven conformational twist, distinct from trans – cis isomerization, significantly enhancing electrical conductivity upon molecular doping.

Ag( i )-based organic–inorganic hybrid system, (TMA)AgBr ₂ , is synthesized, which exhibits ultralow thermal conductivity and thermally-deactivated electrical conductance due to the presence of alternating Ag⋯Ag δ-bonds.

A copper based organic–inorganic hybrid perovskite-like system (TMA) Cu ₂ Br ₃ is synthesized which exhibits impressive photoconductivity properties due to the emergence of excitonic cuprophilic interactions.