Diacetylene-Bridged Periodic Mesoporous Organosilicas with Aggregates: Synthesis and Charge/Energy-Transfer Properties

Diacetylene-bridged periodic mesoporous organosilicas (DAPMOs) with aggregates were synthesized and characterized. The DAPMO-based donor–acceptor charge-transfer (CT) system was prepared under ambient conditions, in which the diacetylenic groups in the pore walls were the electron donors and the decylviologen molecules acted as electron acceptors in the pore channels. The UV/Vis diffuse reflectance spectra and soft X-ray absorption near-edge structure (XANES) spectroscopy showed the formation of the CT complex. Importantly, energy transfer from the diacetylene aggregates to the CT complex occurred upon excitation at 330 nm, which was demonstrated by the fluorescence spectra of the CT systems. This design of hybrid organic–inorganic materials based on PMOs is promising to construct effective electron and energy transfer systems to fabricate optoelectronic materials.