Photoluminescence and Optical Waveguiding Characteristics of Bisalkoxy Tin(IV) Porphyrin Microcrystals

Abstract

Guide me: Laser confocal microscope photoluminescence (LCM-PL) and optical waveguiding characteristics for tin(IV) porphyrin-based microcrystalline rods and plates were investigated. The efficiency of optical waveguiding for the rods (0.04 μm(-1)) was five times better than for the plate, due to stronger π-π interaction and a short layer distance (3.035 vs. 3.328 Å).

A Single‐Benzene‐Based Fluorophore: Optical Waveguiding in the Crystal Form

“…The changes in the intensity ratio ( I guided / I unguided ) as a function of d including single exponential fitting curve can be described as: I guided / I unguided = A exp(−Rd), where A is a constant and R is an optical loss coefficient (Figure d) . The R value was determined to be 0.158 dB/μm, which was comparable and even better than previous reports on the highly crystalline organic microstructures (0.9∼1.6 dB/mm) . The present work elucidates the related photophysics in a simple benzene‐based, organic system, providing an important paradigm of organic integrated photonics.…”

“…[25,40] The R value was determined to be 0.158 dB/μm, which was comparable and even better than previous reports on the highly crystalline organic microstructures (0.9 ~1.6 dB/ mm). [25,26,[38][39][40][41] The present work elucidates the related photophysics in a simple benzene-based, organic system, providing an important paradigm of organic integrated photonics.…”

“…Different from conventional waveguiding phenomena observed in optical fiber that satisfy total internal reflection of axially incident photons, crystalline organic small molecular microstructures exhibited planar optical waveguiding effects, which normally incident photons were propagated laterally . The color CCD images show optically active fluorescence waveguiding of 1D DDT crystal (Figure a,b and Figure S7).…”

“…[37] Different from conventional waveguiding phenomena observed in optical fiber that satisfy total internal reflection of axially incident photons, crystalline organic small molecular microstructures exhibited planar optical waveguiding effects, which normally incident photons were propagated laterally. [37][38][39][40] The color CCD images show optically active fluorescence waveguiding of 1D DDT crystal (Figure 4a,b and Figure S7). Bright blue luminescent spots in color CCD images indicate excitation positions, which were moved from right edge of the 1D DDT crystal to left designated positions (� 1 to � 5 ) with distances of 2.2, 3.4, 4.6, 5.8, and 7.0 μm, respectively.…”

Efficient non-halogenated solvent for the template-free solution synthesis of ultralong copper octaethylporphyrin nanowire networks with strong photoswitching properties

“…These changes are associated with the effects of highly ordered molecular packing in the CuOEP nanowires and H-aggregation formation. 22 From the UVvis spectra, the optical energy gap of the CuOEP nanowires is roughly estimated to be 2.0 eV (Fig. S7 †) by means of the classical Tauc approach.…”