Structural, photophysical, and mesomorphic properties of luminescent platinum(II)-salen Schiff base complexes

Synthesis and aggregation behaviour of luminescent mesomorphic zinc(ii) complexes with ‘salen’ type asymmetric Schiff base ligands

“…The X-ray diffraction pattern recorded at 100°C (Figure 3a, Table 2) contained several sharp and intense Bragg reflections in the small-angle region and two broad scattering halos (visualized by profile fitting of the data) in the wide-angle region. 24,27,28,30 Though the corresponding Zn(II) complexes have been documented, the mesomorphic properties are not reported. The sharpness of the small-angle reflections indicates long-range correlation of the structure.…”

“…[1][2][3][4] A plethora of salen based complexes are now known to act as efficient catalysts both in homogeneous and heterogeneous reactions for asymmetric ring-opening of epoxides, aziridination, cyclopropanation, oxidation, reduction reaction of ketones, epoxidation of olefins, formation of cyclic and linear polycarbonates, catalytic enantio-selective and diastereoselective redox reactions and Diels-Alder reactions. [9][10][11][12] Besides, such systems are also known to exhibit interesting fluorescence, [13][14][15][16][17] magnetic, 17,18 non-linear optical [19][20][21] and liquid crystalline properties [22][23][24][25][26][27][28][29][30] and act as electrochemical sensors. [9][10][11][12] Besides, such systems are also known to exhibit interesting fluorescence, [13][14][15][16][17] magnetic, 17,18 non-linear optical [19][20][21] and liquid crystalline properties [22][23][24]…”

Wide‐Range Columnar and Lamellar Photoluminescent Liquid‐Crystalline Lanthanide Complexes with Mesogenic 4‐Pyridone Derivatives

“…In the XRD patterns of the lanthanide complexes with shorter alkyl chains, a series of three or four equidistant sharp diffraction peaks was observed in the low‐angle region, assigned to d 001 , d 002 , d 003 , and d 004 reflections attributed to a rather lamellar structure of the mesophase (Figure a). An additional peak around 5 Å found for Eu‐8 suggests periodicity at this distance, and it could be assigned to an interaction between neighboring molecules arranged in a typical lamellar packing mode . Several lanthanidomesogens having different types of ligands, such as substituted imidazo[4,5‐ f ]‐1,10‐phenanthroline with cyanobiphenyl mesogenic groups or 2,6‐bis (1‐ethyl‐benzimidazol‐2‐yl)pyridine substituted with lipophilic gallic acid derivatives, have been found to adopt a lamello‐columnar mesophase organization .…”

“…An additional peak around5 found for Eu-8 suggestsp eriodicity at this distance, and it could be assigned to an interaction between neighboring molecules arranged in at ypical lamellar packingm ode. [49][50][51] Several lanthanidomesogens having different types of ligands, such as substituted imidazo[4,5-f]-1,10-phenanthroline with cyanobiphenylm esogenic groups [32] or 2,6-bis( 1-ethyl-benzimidazol-2yl)pyridines ubstituted with lipophilic gallic acidd erivatives, have been found to adopt al amello-columnar mesophase organization. [52] Ap articulart hermalb ehaviorw as seen for com-poundsw ith ten carbon atoms in the alkyl side chains.…”

Influence of integrated alkyl-chain length on the mesogenic and photophysical properties of platinum-based metallomesogens and their application for polarized white OLEDs

“…Phosphorescent square planar platinum complexes appear very promising in view M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 of achieving efficient polarized electroluminescence: by harvesting both singlet and triplet excitons they could lead to 100% internal quantum efficiency and their planar structure favor the formation of liquid crystalline phases and promotes charge mobility in OLEDs. Efforts have been particularly devoted to developing arylpyridine derivative based platinum metallomesogens [23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Although these platinum metallomesogens showed intense emission both in solution and in solid state [37][38][39][40][41], the investigation of the polarized emission is still limited, with only few reported examples.…”