A meta-disubstituted aryl gold isocyanide complex showing pseudopolymorphism exhibit various emission properties. These pseudopolymorphs also show reversible luminescent mechanochromism.

The first examples of porousm olecular crystals that are assembled through Au···Au interactions of gold complex 1 are here reporteda long with their exchange properties with respect to their guestc omponents.S inglecrystal X-ray diffraction (XRD) analyses indicatet hat the crystal structure of 1/CH 2 Cl 2 ·pentane is based on cyclic hexamers of 1,w hich are formedt hrough six Au···Au interactions. The packingo ft hese cyclic hexamers affords ap orousa rchitecture, in which the one-dimensionalc hannel segmentc ontains CH 2 Cl 2 and pentane as guests. These guestsc an be ex-changed through operationally simple methods under retention of the host framework of 1,w hich furnished 1/guest complexes with 26 differentg uests.As ingle-crystal XRD analysiso f1/eicosane, which contains the long linear alkane eicosane (n-C 20 H 42 ), successfully provided its accurately modeled structurew ithin the porous material. These host-guest complexes show chromic luminescence with both blue-and redshifted emissions.M oreover,t his porouso rganometallic materialcan exhibit luminescentmechanochromism through release of guests.[a] Dr.Figure 10. Emission spectra of 1/CH 2 Cl 2 ·pentane(blue line)and 1 ground (green line). Inset shows aphotographo f1 ground recorded under UV light.Figure 9. a) Optimized triplet structure of 1/CH 2 Cl 2 ·pentane.b )Upper and c) lowerS OMO of the optimized triplet structure of 1/CH 2 Cl 2 ·pentane. Ad etailed description of the modeling and calculation conditionsisg iven in the Supporting Information.

It is found that deformation luminescence gives us information about the microscopic yield process of X-ray irradiated KCl:Ca 2+. The stress-strain curve has a macroscopic yield point. But we find that luminescence appears to start before the macroscopic yield. This means that dislocation begin to move before the macroscopic yield because deformation luminescence is attributed to radiation-induced dislocation motion. The beginning of luminescence is considered to be the microscopic yield.Investigating the dependence of microscopic yield stress on strain rate and impurity concentration gives us additional information. The activation volume obtained from the dependence of microscopic yield stress on strain rate is comparable to the value estimated from the concentration of impurity. Then the dislocation starts to move overcoming impurity-vacancy dipoles as obstacles to dislocation motion. The dislocation density starts to increase at the microscopic yield point and then sharply increases to the macroscopic yield.