A low molecular weight OLED material: 2-(4-((2-hydroxyethyl)(methyl)amino)benzylidene)malononitrile. Synthesis, crystal structure, thin film morphology, spectroscopic characterization and DFT calculations

Abstract

A low molecular weight fluorescent malononitrile derivative showed an efficient solid-state emission and electroluminescence properties.

White light employing luminescent engineered large (mega) Stokes shift molecules: a review

“…A low molecular weight material with a single aromatic ring has been highlighted in a study conducted by Percino and his group. 58 They introduced two electron-withdrawing cyano groups in 4-((2-hydroxyethyl)(methyl)-amino)benzaldehyde, and compared its luminescence property with the commercial polymer poly(2-methoxy-5(2′-ethyl)hexoxy phenylenevinylene) (MEH-PPV). Compellingly, their compound showed red emission, which red-shifted slightly by 67 nm when compared to MEH-PPV.…”

Advances in Solution‐Processed OLEDs and their Prospects for Use in Displays

“…Even if orthogonal solvents (water, alcohol) are used, the organic thin films can be physically damaged, because small organic molecules interact weakly by van der Waals forces, hydrogen bonds, and π-π stacking. [212][213][214] When the final organic functional layer uses orthogonal solvent processing with water or alcohol, the organic host matrix in EML should be chemically and physically robust. To fulfill this requirement while using smallmolecule hosts, an efficient strategy to improve solvent resistivity is to increase the molecular weight of organic smallmolecule hosts.…”

“…To fulfill this requirement while using smallmolecule hosts, an efficient strategy to improve solvent resistivity is to increase the molecular weight of organic smallmolecule hosts. [38,212,215] A simple and efficient approach using covalent dimerization and trimerization can improve solvent resistance of conventional hosts in an EML. [38] Covalent dimerization and trimerization increase the mole cular weight of conventional organic smallmolecule hosts, and thereby improve the resistance of EMLs to subsequent solution processing using hydrophilic alcohol solvents (e.g., methanol, ethanol, 1propanol, 2propanol).…”

“…To fulfill this requirement while using small‐molecule hosts, an efficient strategy to improve solvent resistivity is to increase the molecular weight of organic small‐molecule hosts. [ 38,212,215 ] A simple and efficient approach using covalent dimerization and trimerization can improve solvent resistance of conventional hosts in an EML. [ 38 ]…”

A site-isolated Lewis acidic aluminium and Brønsted basic amine sites in the dimeric silsesquioxane cage as a reusable homogeneous bifunctional catalyst for one-pot tandem deacetalization/deketalization-Knoevenagel condensation reactions

“…47 In particular, aryl and (1-arylethylidene)malononitriles derivatives have gained much attention because of some unique properties for different applications such as nonlinear optical, electrical, biological and medical applications. [48][49][50][51][52][53][54] Considering the importance of arylidene malononitriles, the bifunctional Al-POSS-NH 2 (2) catalyst was developed and utilized to synthesize various malononitrile derivatives via one-pot tandem deacetalization/deketalization-Knoevenagel condensation reactions from acetals/ketals.…”