Coumarin–tetraphenylethylene (CTPE) regioisomers with different linkage types and substitution positions (coumarin C5, C6, C7) were synthesized, characterized, photophysical and aggregation-induced emission properties reported.

No abstract

No abstract

A series of tetraphenylethylene-porphyrin conjugates ((TPE)nH2Ps, n = 1, 2, and 4) are synthesized by Lindsey condensation and Adler-Longo methods. (TPE)nH2Ps are structurally characterized by 1H-NMR and MALDITOF mass spectrometry, and the photophysical and electrochemical properties are analyzed by UV-Vis absorption and fluorescence spectroscopies, and cyclic voltammetry. As the number of TPE increase, the porphyrin band gaps were slightly decreased, together with a small bathochromic shift of absorption and red shift in emission bands. The theoretical DFT calculations also showed good agreement with the experimental results. From TEM observations, (TPE)2H2P and (TPE)4H2P formed nanotubes with a diameter of 10 to 20 nm and a length of about 100 nm in a chlorobenzene/n-hexane (1:1 v/v) mixture and found that the wall thickness of nanotubes increased with the number of TPE moieties.

Fluorescence probe is one of the most powerful tools for cellular imaging. Here, three phospholipid-mimicking fluorescent probes (FP1–FP3) comprising fluorescein and two lipophilic groups of saturated and/or unsaturated C18 fatty acids were synthesized, and their optical properties were investigated. Like in biological phospholipids, the fluorescein group acts as a hydrophilic polar headgroup and the lipid groups act as hydrophobic non-polar tail groups. Laser confocal microscope images illustrated that FP3, which contains both saturated and unsaturated lipid tails, showed great uptake into the canine adipose-derived mesenchymal stem cells.