Fig. 4. Far-red to blue TTA-UC bioplastic film in air. (a) and (b) Photographs of G-TXr-TIPS-AnS-Os(m-peptpy)2(TFSI)2 film under white light and under 700 nm nanosecond pulsed laser excitation in the air with excitation intensity = 0.9 mJ pulse−1 (no short pass filter used). (c) Normalized absorption, and emission spectra of G-TXr-TIPS-AnS-Os(m-peptpy)2(TFSI)2 film wherein the blue line shows the absorption spectrum of TIPS-AnS, and the red lines show absorption (inset, dotted line) and emission (solid line, λex = 640 nm) spectra of Os(m-peptpy)2(TFSI)2 in the film. (d) UC emission rise and decay profile of G-TXr-TIPS-AnS-Os(m-peptpy)2(TFSI)2 film in the air upon 700 nm and 730 nm nanosecond pulsed laser excitation.
