Ultrafast Luminescence Detection with Selective Adsorption of Carbon Disulfide in a Gold(I) Metal-Organic Framework.

Although a widely used and important industrial chemical, carbon disulfide (CS) poses a number of hazards due to its volatility and toxicity. As such, the development of multifunctional materials for the selective capture and easy recognition of CS is one of the crucial issues. Herein, we demonstrate completely selective CS adsorption among trials involving HO, alcohols, volatile organic compounds (including thiol derivatives), N, H, O, CH, CO, NO, and CO. We also showcase its fine detection using remarkable luminescent response in a gold(I)-based metal-organic framework (MOF) of {Zn(pz)[Au(CN)]} (pz=pyrazine; 1) with a two-fold interpenetration network. Ex situ single crystal X-ray diffraction for 1 and CS-accommodated 1 suggested that the Au ⋅⋅⋅ Au atoms are not only luminescent centers but also act as interaction sites for CS modulating the Au ⋅⋅⋅ Au contacts. These experiments revealed the specificity of CS and how changes in the CS-induced structure. Based on the obtained structural transformation, 1 exhibited a sensitive detecting ability for CS with an ultrafast response time of less than 10 s. Moreover, ex situ time-resolved photoluminescence analyses developed in this work implied that CS varied the energetic relaxation at the excited states related to the luminescent efficiency of the resultant MOF system.