title: 3,5-bis[4-(diethylamino)benzylidene]-1-methyl-4-piperidone and 3,5-bis[4-(diethylamino)cinnamylidene]-1-methyl-4-piperidone: prospective biophotonic materials.
abstract: The structures of 3,5-bis[4-(diethylamino)benzylidene]-1-methyl-4-piperidone, C(28)H(37)N(3)O, (I), and 3,5-bis[4-(diethylamino)cinnamylidene]-1-methyl-4-piperidone, C(32)H(41)N(3)O, (II), have been characterized. Because of conjugation between donor and acceptor parts, the central heterocycles (including the carbonyl group) in (I) and (II) are flattened and exhibit a 'sofa' conformation, with a deviation of the N atom from the planar fragment. The dihedral angles between the planar part of the heterocycle and the two almost flat fragments that include a phenyl ring and bridging atoms are 23.2 (1) and 11.2 (1) degrees in (I), and 11.8 (1) and 8.7 (2) degrees in (II). One- and two-photon absorption of light and the fluorescence of (I) and (II) have also been characterized.
authors: Department of Natural Sciences, New Mexico Highlands University, Las Vegas, NM 87701, USA. vnesterov@nmhu.edu
authors: Vladimir N
authors: VN
authors: Nesterov
authors: Tatiana V
authors: TV
authors: Timofeeva
authors: Sergey S
authors: SS
authors: Sarkisov
authors: Alexander
authors: A
authors: Leyderman
authors: Charles Y C
authors: CY
authors: Lee
authors: Mikhail Yu
authors: MY
authors: Antipin