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Structural modifications through π-interactions usually result in redshifts in luminescence and, as a consequence, the loss of the natural color of the chromophore. Besides, employing Si-Si σ-bridging to manipulate the electronic properties of organic materials has remained largely unexplored. Herein, we report a series of novel bis-tetraphenylethenes (BTPEs) with oligosilanyl linkages, termed BTPE-Sin molecules, used to manipulate the photophysical properties of luminogens subtly through σ-π conjugation. These oligosilanyl-bridged molecules were thermally, highly stable, and exhibited enhanced aggregation-induced emissions, as well as luminescence efficiencies while retaining most of their original color. Our current BTPEs fabrications have easy-to-operate, fast, and high-resolution identification properties toward LFPs. Also, they are highly specific to individuals, and hence, vital in forensic investigations. We achieved these features through the introduction of oligosilanyl chains that increased the lipophilicity of the significantly. This work offers a universal and straightforward approach for the generation of highly emissive organic materials and enables fine-tuning of their electronic properties for multifunctional applications.

Two novel Si-bridged meso-annulated BODIPY dyes have been prepared through the intermolecular C-I silylation and subsequent intramolecular C-H silylation in one-pot reaction. Marked redshift of the main spectral bands are...

Oligosilanyl-bridged systems are expected to give rise to unique optoelectronic properties because of σ–π conjugation between the Si–Si σ orbital and the aryl π orbital. Herein, we synthesized a small series of novel biscarbazoles bridged with permethylated oligosilanyl units (−[Si(CH 3 ) 2 ] n –, n = 1–4) and examined their spectroscopic properties in detail. In the target molecules BCzSi n , n = 2–4, the efficient σ–π conjugation elevated the highest occupied molecular orbital energy level with no influence on the lowest unoccupied molecular orbital. In the solid state, the emission full width at half-maximum (fwhm) of all the compounds narrowed significantly, while the emission efficiency increased and the emission color of carbazole was retained. This research provided a very simple and general way of subtly manipulating the electronic properties of organic materials to construct an emissive color-retaining system for multifunctional applications.