Flexible to rigid: IR spectroscopic investigation of a rhenium-tricarbonyl-complex at a buried interface

Abstract

This work explores the solid-liquid interface of a rhenium-tricarbonyl complex embedded in a layer of zirconium oxide deposited by atomic layer deposition (ALD). Time-resolved and steady state infrared spectroscopy were...

Control over Charge Separation by Imine Structural Isomerization in Covalent Organic Frameworks with Implications on CO2 Photoreduction

“…As shown in Figure e, the extended X-ray absorption fine structure (EXAFS) spectrum of Re-r-COF resembles that of Re­(bpy)­(CO) 3 Cl and Re-f-COF (Figure S12) and can be adequately fit by FEFF calculation based on a reported Re­(bpy)­(CO) 3 Cl crystal structure (CCDC Deposition #649892), where Re is coordinated by three C (CO), two N (bpy), and one Cl. This unambiguously confirms the presence of fac -Re­(bpy)­(CO) 3 Cl and supports that Re was incorporated into r-COF through bipyridine in Re-r-COF. ,− The fitting results (top panel in Figure e) indicate a decrease in the Re–C bond length in Re-r-COF (1.83 Å equatorial and 1.84 Å axial) compared with those in Re-f-COF (1.91 Å equatorial and 1.88 Å axial). These bond reductions in Re-r-COF coincide with the elongation of Re–N (2.24 Å) and Re–Cl (2.47 Å) bonds, as opposed to those in Re-f-COF (2.17 Å for Re–N and 2.45 Å for Re–Cl).…”