Precise mechanical processing of optical microcrystals involves complex microscale operations viz. moving, bending, lifting, and cutting of crystals. Some of these mechanical operations can be implemented by applying mechanical force at specific points of the crystal to fabricate advanced crystalline optical junctions. Mechanically compliant flexible optical crystals are ideal candidates for the designing of such microoptical junctions. A vapor‐phase growth of naturally bent optical waveguiding crystals of 1,4‐bis(2‐cyanophenylethynyl)benzene (1) on a surface forming different optical junctions is presented. In the solid‐state, molecule 1 interacts with its neighbors via CH⋅⋅⋅N hydrogen bonding and π–π stacking. The microcrystals deposited at a glass surface exhibit moderate flexibility due to substantial surface adherence energy. The obtained network crystals also display mechanical compliance when cut precisely with sharp atomic force microscope cantilever tip, making them ideal candidates for building innovative T‐ and Δ‐shaped optical junctions with multiple outputs. The presented micromechanical processing technique can also be effectively used as a tool to fabricate single‐crystal integrated photonic devices and circuits on suitable substrates.

A series of Donor–π–Acceptor–π–Donor compounds based on a 2H-benzo[d][1,2,3]triazole core branched with different alkynyl donor groups has been characterized and tested in organic field-effect transistors (OFETs).

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A strategic approach to control the polymorphism of two related drugs by introducing a drugmimetic imide functional group into the molecular weight organogelator structure is presented. This was achieved with novel aminoglutethimide-derived bis(urea) organogelators designed to form gels that act as targeted crystallization media for (±)-thalidomide and barbital. The organogelators prevent concomitant crystallization, a serious issue for drug formulation and development. This work demonstrates the potential to control concomitant crystallization with rationally designed supramolecular gelators.

2H-Benzo[d]1,2,3-triazole derivatives give rise to a supergelator that results in the crystallization of kinetic form I sulfathiazole.

Different alkynyl azoles and benzoazoles have been synthesized in good yields by carbon‐carbon coupling reactions. The self‐assembly of some of these compounds by the slow diffusion technique led to well‐defined ribbons and needle‐like aggregates. The X‐ray study of some materials showed that the CH‐π interactions involving the C≡C triple bond and the heteroatoms induce aggregation along with H‐bonds due to the methoxy groups. A fluorescence and confocal optical microscopy study of most of the aggregates indicated optical waveguide behavior with different colors.

Formation of all-carbon-substituted quaternary carbons is a key challenge in organic and medicinal chemistry.

As eries of donor-p-acceptor-p-donor (D-p-A-p-D) benzoazole dyes with 2H-benzo[d][1,2,3]triazole or BTD cores have been prepared and their photophysical properties characterized. The properties of these compounds display remarkable differences, mainly as ar esult of the electron-donor substituent. Dyes with the best properties have visible-light absorptionover l = 400 nm, large Stokess hifts in the range of about3 500-6400 cm À1 ,a nd good fluores-cence emissionw ith quantum yields of up to 0.78. The twophotona bsorption propertiesw ere also studied to establish the relationship betweens tructure and properties in the differentc ompounds synthesized. Theser esults provided cross sections of up to 1500 GM, with ap redominance of S 2 ! S 0 transitions andahigh charge-transfer character.T ime-dependent DFT calculations supported the experimental results.