Construction of soft porous crystal with silole derivative: strategy of framework design, multiple structural transformability and mechanofluorochromism

Abstract

Novel fluorescent organic soft porous crystals have been designed and prepared based on a multisubstituted silole bearing 1-phenyl-2,2-dicyanoethene moieties (molecule 8). 8 exhibited a series of emission colors, ranging from yellow to dark red with an over 70 nm shift of emission maximum. Molecule 8 also showed the ability to reversibly switch between different solid states, and a typical mechanofluorochromism was observed by cyclic operation of the grinding-heating-cooling processes. In addition, two single crystals (O and R) were successfully obtained in proper conditions, and the crystallographic data indicated that crystal O and R had reasonable hollow structures, inside which different solvent molecules were selectively encapsulated. More importantly, we have presented a proof-of-concept example of the strategy for the designation of organic soft porous crystals with a conjugated fluorophore and demonstrated the successful achievement of softness, porosity and crystallization ability. This design strategy is instructive to design and construct organic soft porous crystals with other conjugated building blocks and develop novel smart and stimuli-responsive photo/ electronic materials.

Controllable synthesis and spontaneous phase transition of photonic coordination polymer to produce a strong second-harmonic generation response

“…Moreover, organic molecules are detrimental to AIEgens' applications due to their single organic skeleton, low melting point, and low thermal stability. The RIR of AIEgens is permanently inhibited in the crystal lattice from coordination with various metals; thus solid-state coordination polymers (CPs) constructed by AIE ligands could maintain the photophysical properties of the AIEgens' aggregated state, display novel long-distance order structures [24], and even produce special properties that are different from AIEgens.…”

Role‐Allocated Combination of Two Types of Hydrogen Bonds towards Constructing a Breathing Diamondoid Porous Organic Salt

“…In connection with this, several reports have emerged recently for constructing new flexible organic porous structures. Tang and co‐workers designed flexible porous structures based on multisubstituted silole derivatives 10. Meanwhile, Rissanen and Raatikainen utilized halogen bonds combined with hydrogen bonds to yield porous structures with solvent‐induced adaptation of the nanosized channels 11.…”

“…Tang and co-workers designed flexible porous structures based on multisubstituted silole derivatives. [10] Meanwhile, Rissanen and Raatikainen utilized halogen bonds combined with hydrogen bonds to yield porous structures with solvent-induced adaptation of the nanosized channels. [11] Nevertheless, flexible organic porous structures often irreversibly end up close-packing and non-porous structures by guest desorption to maximize interactions between the components.…”

Mechano-fluorochromic behavior of AEE polyurethane films and their high sensitivity to halogen acid gas

“…They synthesized several PAIE materials and proposed that AIE compounds containing a twisted conformation would exhibit piezouorochromic activity. 11 Till now, numerous reported AIE compounds, such as typical triphenylethylene, 12 tetraphenylethylene (TPE), [13][14][15][16][17] silole, 18 cyano-distyrylbenzene, 19-21 9,10-distyrylanthracene and their derivatives [22][23][24][25][26][27][28][29][30][31] were found to possess PAIE feature.…”