Squid leucophore-inspired engineering of optically dynamic human cells.

Cephalopods (e.g., squids, octopuses, and cuttlefishes) possess remarkable dynamic camouflage abilities and therefore have emerged as powerful sources of inspiration for the engineering of dynamic optical technologies.

Single-Crystal Investigation, Hirshfeld Surface Analysis, and DFT Study of Third-Order NLO Properties of Unsymmetrical Acyl Thiourea Derivatives.

In the current research work, unsymmetrical acyl thiourea derivatives, 4-((3-benzoylthioureido)methyl)cyclohexane-1-carboxylic acid and methyl 2-(3-benzoylthioureido)benzoate , have been synthesized efficiently. The structures of these crystalline thioureas were unambiguously confirmed by single-crystal diffractional analysis. The crystallographic investigation showed that the molecular configuration of both compounds is stabilized by intramolecular N-H···O bonding.

Mol-ecular and crystal structure, optical properties and DFT studies of 1,4-dimeth-oxy-2,5-bis-[2-(4-nitro-phen-yl)ethen-yl]benzene.

The title compound DBNB, CHNO, has been crystallized and studied by X-ray diffraction, spectroscopic and computational methods. In the title mol-ecule, which is based on a 1,4-distyryl-2,5-di-meth-oxy-benzene core with -nitro-substituted terminal benzene rings, the dihedral angle between mean planes of the central fragment and the terminal phenyl ring is 16.46 (6)°.

Mol-ecular and crystal structure, lattice energy and DFT calculations of two 2'-(nitro-benzo-yloxy)aceto-phenone isomers.

The two isomers 2'-(4-nitro-benzo-yloxy)aceto-phenone (systematic name: 2-acetyl-phenyl 4-nitro-benzoate) () and 2'-(2-nitro-benzo-yloxy)aceto-phenone (systematic name: 2-acetyl-phenyl 2-nitro-benzoate) (), both CHNO, with and positions of the nitro substituent have been crystallized and studied. It is evident that the variation in the position of the nitro group causes a significant difference in the mol-ecular conformations: the dihedral angle between the aromatic fragments in the mol-ecule of is 84.80 (4), while that in the mol-ecule of is 6.

Crystal structures, syntheses, and spectroscopic and electrochemical measurements of two push-pull chromophores: 2-[4-(di-methyl-amino)-benzyl-idene]-1-indene-1,3(2)-dione and ()-2-{3-[4-(di-meth-ylamino)-phen-yl]allyl-idene}-1-indene-1,3(2)-dione.

The title pull-push chromophores, 2-[4-(di-methyl-amino)-benzyl-idene]-1-indene-1,3(2)-dione, CHNO (ID[1]) and ()-2-{3-[4-(di-methyl-amino)-phen-yl]allyl-idene}-1-indene-1,3(2)-dione, CHNO (ID[2]), have donor-π-bridge-acceptor structures. The mol-ecule with the short π-bridge, ID[1], is almost planar while for the mol-ecule with a longer bridge, ID[2], is less planar. The benzene ring is inclined to the mean plane of the 2,3-di-hydro-1-indene unit by 3.

Synthesis and structural study of organic two-photon-absorbing cycloalkanone chromophores.

The three organic two-photon-absorbing cycloalkanone chromophores 2,4-bis[4-(diethylamino)benzylidene]cyclobutanone, CHNO (I), 2,5-bis[4-(diethylamino)benzylidene]cyclopentanone, CHNO (II), and 2,6-bis[4-(diethylamino)benzylidene]cyclohexanone, CHNO (III), were obtained by a reaction between 4-(diethylamino)benzaldehyde and the corresponding cycloalkanone and were characterized by single-crystal X-ray diffraction studies, as well as density functional theory (DFT) quantum-chemical calculations. Molecules of this series have three main fragments, i.e.

Crystal structure of tetra-methyl-ammonium 1,1,7,7-tetra-cyano-hepta-2,4,6-trienide.

The title compound, CHN·CHN , contains one tetra-methyl-ammonium cation and one 1,1,7,7-tetra-cyano-hepta-2,4,6-trienide anion in the asymmetric unit. The anion is in an all- conjugated C=C bonds conformation. Two terminal C(CN) di-nitrile moieties are slightly twisted from the polymethine main chain to which they are attached [C(CN)/C dihedral angles = 6.

Synthesis and structure of push-pull merocyanines based on barbituric and thio-barbituric acid.

Two compounds, 1,3-diethyl-5-{(2,4)-6-[()-1,3,3-tri-methyl-indolin-2-yl-idene]hexa-2,4-dien-1-yl-idene}pyrimidine-2,4,6(1,3,5)-trione or TMI, CHNO, and 1,3-diethyl-2-sulfanyl-idene-5-[2-(1,3,3-tri-methyl-indolin-2-yl-idene)ethyl-idene]di-hydro-pyrimidine-4,6(1,5)-dione or DTB, CHNOS, have been crystallized and studied. These compounds contain the same indole derivative donor group and differ in their acceptor groups (in TMI it contains oxygen in the position, and in DTB sulfur) and the length of the π-bridge. In both materials, mol-ecules are packed in a herringbone manner with differences in the twist and fold angles.

Synthesis, crystal structure studies and solvatochromic behaviour of two 2-{5-[4-(dimethylamino)phenyl]penta-2,4-dien-1-ylidene}malononitrile derivatives.

The synthesis, crystal structure studies and solvatochromic behavior of 2-{(2E,4E)-5-[4-(dimethylamino)phenyl]penta-2,4-dien-1-ylidene}malononitrile, CHN (DCV[3]), and 2-{(2E,4E,6E)-7-[4-(dimethylamino)phenyl]hepta-2,4,6-trien-1-ylidene}malononitrile, CHN (DCV[4]), are reported and discussed in comparison with their homologs having a shorter length of the π-conjugated bridge. The compounds of this series have potential use as nonlinear materials with second-order effects due to their donor-acceptor structures. However, DCV[3] and DCV[4] crystallized in the centrosymmetric space group P2/c which excludes their application as nonlinear optical materials in the crystalline state.