Physics

Yield (engineering)

Organic chemistry

Endothermic process

Adsorption

Catalysis

Physical chemistry

Excited state

Quantum yield

Nuclear physics

Chemistry

Metallurgy

Materials science

Alkyl

Bromine

Quantum mechanics

Aryl

Platinum

Photochemistry

Fluorescence

Inorganic Chemistry

Pt(IV) complexes trans-Pt(PEt3)2(R)(Br)3 (R = Br, aryl and polycyclic aromatic fragments) photoeliminate molecular bromine with quantum yields as high as 82%. Photoelimination occurs both in the solid state and in solution. Calorimetry measurements and DFT calculations (PMe3 analogs) indicate endothermic and endergonic photoeliminations with free energies from 2 to 22 kcal/mol of Br2. Solution trapping experiments with high concentrations of 2,3-dimethyl-2-butene suggest a radical-like excited state precursor to bromine elimination.

High Quantum Yield Molecular Bromine Photoelimination from Mononuclear Platinum(IV) Complexes