Solution processed high performance pentacene thin-film transistors.

High performance thin-film transistors were fabricated using a new precursor of pentacene through a multiple spin-heat procedure. High quality pentacene thin films can be prepared by this method and hence a FET device can be made in a top-contact configuration. The device exhibited a remarkable field-effect mobility of 0.

2-(4-Nitro-benzyl-idene)malononitrile.

In the title compound, C(10)H(5)N(3)O(2), the benzyl-idene-malono-nitrile unit is nearly planar, with a maximum deviation of 0.129 (2) Å for a terminal N atom; the nitro group is approximately coplanar with the benzene ring [dihedral angle = 8.8 (3)°].

(E)-4-[(4-Diethyl-amino-2-hy-droxy-benzyl-idene)amino]-benzonitrile.

The title compound, C(18)H(19)N(3)O, displays an E conformation with respect to the C=N double bond. The dihedral angle between the mean planes of the two benzene rings is 24.49 (3)°.

(Z)-4-(2-Hy-droxy-benzyl-idene)-1-methyl-2-phenyl-1H-imidazol-5(4H)-one.

In the title compound, C(17)H(14)N(2)O(2), the asymmetric unit comprises two mol-ecules that are comformationally similar [the dihedral angles between the phenyl rings in each are 46.35 (2) and 48.04 (3)°], with the conformation stabilized by intra-molecular O-H⋯N hydrogen bonds, which generate S(7) rings.

3-{[(4Z)-1,2-Dimethyl-5-oxoimidazol-4-yl-idene]meth-yl}-4-hy-droxy-benzonitrile.

In the title compound, C(13)H(11)N(3)O(2), an intra-molecular O-H⋯N hydrogen bond generates an S(7) ring. The dihedral angle between the mean plane of the benzene ring and the imidazolidinone ring is 3.05 (2)°.

1-Hy-droxy-11H-benzo[b]fluoren-11-one.

The title compound, C(17)H(10)O(2), is nearly planar, the maximum atomic deviation being 0.053 (2) Å. In the mol-ecule, an intra-molecular O-H⋯O hydrogen bond generates an S(6) ring motif.

2-(2-Hy-droxy-phen-yl)-1,3-benzothia-zole-6-carbaldehyde.

The mol-ecule of the title compound, C(14)H(9)NO(2)S, is nearly planar, the maximum atomic deviation being 0.081 (2) Å. An intra-molecular O-H⋯N bond generates an S(6) ring motif.

rac-1,2,3,4-Tetra-hydro-1,4-methano-anthracene-6,7-dicarbonitrile.

The title compound, C(17)H(12)N(2), comprises a norbornane unit having a dicyanona-phthalene ring fused on one side. Both cyano groups are twisted slightly out of the plane of the naphthalene ring system [C-C-C-C torsion angle = 1.9 (2)°].

Fine tuning the energetics of excited-state intramolecular proton transfer (ESIPT): white light generation in a single ESIPT system.

Using 7-hydroxy-1-indanone as a prototype (I), which exhibits excited-state intramolecular proton transfer (ESIPT), chemical modification has been performed at C(2)-C(3) positions by fusing benzene (molecule II) and naphthalene rings, (molecule III). I undergoes an ultrafast rate of ESIPT, resulting in a unique tautomer emission (λ(max) ∼530 nm), whereas excited-state equilibrium is established for both II and III, as supported by the dual emission and the associated relaxation dynamics. The forward ESIPT (normal to proton-transfer tautomer species) rates for II and III are deduced to be (30 ps)(-1) and (22 ps)(-1), respectively, while the backward ESIPT rates are (11 ps)(-1) and (48 ps)(-1).

(6RS,9SR)-6,7-Dibromo-1,2,3,4-tetra-hydro-1,4-methano-anthracene.

The title compound, C(15)H(12)Br(2), comprises a norbornane unit having a dibromo-naphthalene ring fused on one side. Both Br atoms are twisted slightly out of the plane of the naphthalene ring system with a Br-C-C-Br torsion angle of 5.3 (5)°.

5-Hy-droxy-indan-1-one.

In the title compound (5HIN), C(9)H(8)O(2), is perfectly planar as all atoms, except the H atoms of both CH(2) groups, lie on a crystallographic mirror plane. In the crystal, mol-ecules are linked by strong inter-molecular O-H⋯O hydrogen bonds, forming an infinite chain along [100], generating a C(8) motif.

7-Hy-droxy-indan-1-one.

In the title compound, C(9)H(8)O(2), an intra-molecular O-H⋯O hydrogen bond generates an S(6) ring. The dihedral angle between the mean plane of the S(6) ring and the benzene ring is 1.89 (2)°.