Electronic absorption and fluorescence of new tetrafluoro-pentenyl-perylene in isotropic solvents, liquid crystal layers, and LB films

New perylene dyes, derivatives of 1,6,7,12‐tetrachloroperylene‐3,4,9,10‐tetracarboxylic acid: synthesis and application

“…Dye 15 was obtained with 67% yield (2.4 g) as a yellow solid. Method C Tetra(n-hexadecyl) ester of 1,6,7,12-tetrachloroperylene-3,4,9,10-tetracarboxylic acid (14). Compound 14 was synthesised in a similar way to dye 3, using n-hexadecyl bromide (7.8 g, 0.026 mol) and hexadecyltributylphosphonic bromide (0.06 g) as a catalyst.…”

“…Products obtained by this method are of high purity, and the reactions yields are high [11]. Perylene esters possess good solubility in organic solvents and exhibit good spectroscopic and fluorescence properties, so they can be used in liquid crystal layers and Langmuir and Langmuir-Blodgett films, as described elsewhere [12][13][14][15][16][17].…”

Physical Vapor Deposited Films of a Perylene Derivative: Supramolecular Arrangement and Thermal Stability

“…This trend is also observed for PhPTCD in the form of Langmuir-Blodgett film (LB), 18 in addition to other perylene derivatives forming either PVD 11,[29][30][31] or LB films. [32][33][34][35] The emission of the PhPTCD PVD films was investigated using the 514.5 nm excitation laser line, which spectrum for a 150 nm thickness film on quartz with a maximum at 689 nm shown in Figure 3. The broad and structureless emission band (from 620 nm to 900 nm in this case) found for perylene derivatives is assigned to excimer fluorescence, 36 which is related to molecular stacking that requires the chromophores to be organized parallel and overlapping ring systems.…”

Synthesis, mesomorphic and photophysical properties of novel triads and pentads of perylene liquid crystals with cholesterol units at the bay-position

“…[7][8][9] Among all kinds of PBI aggregates, PBI liquid crystals (LC) have attracted much attention due to their excellent p-p stacking properties for supramolecular selfassembling processes. 10,11 By modifying the imide groups with siloxane, 12,13 polyoxyethylene chain, 14 uoro-pentenyl groups, 15 alkyl esters, 16 organosilica, 17 alkoxyl/alkyl groups, 18,19 dendritic peptides, 20 phenyl substituents, 21,22 3,4,5-trialkoxyphenyl, 23,24 or triphenylene groups, [25][26][27] different series of perylene columnar liquid crystals have been synthesized and their mesomorphic properties investigated. A survey of relevant literature implied that all perylene liquid crystals were prepared by modifying the two imide positions with two alkyl groups.…”