Six novel octakis(dialkoxyphenoxy)phthalocyaninatocopper(II) complexes (abbreviated as [(CnO)2PhO]8PcCu (n = 9–14)) have been synthesized. It was found that these derivatives exhibit rich mesophases; Colh, Colr1, Colr2, Colr3, Coltet and Cub phases. These mesophases were characterized by microscopic observation, DSC measurements temperature-dependent X-ray diffraction measurements. Temperature-dependent electronic spectra for the thin films of revealed roof-top-shaped dimers in column...

A series of bis[octakis(alkylthio)phthalocyaninato]rare-earth-metal(III) discotic compounds, [(CnS)8Pc]2M (M = Eu(III), Tb(III), Lu(III); n 8, 10, 12, 14, 16, 18), has been synthesized. The mesomorphic and supramolecular structures have investigated by using differential scanning calorimetry, polarization microscopy temperature-dependent X-ray diffraction techniques. From the spectroscopic results, it was revealed that in each rare-earth compound classes, [(CnS)8Pc]2Eu (n 12), [(CnS)8Pc]2Tb...

A family of copper and zinc phthalocyanine-based amphiphililes possessing racemic optically active diol units, (rac)-ZnPc(OH)16, (rac)-CuPc(OH)16, (S)-CuPc(OH)16, have been synthesized. The self-assembling properties these amphiphiles in aqueous solution studied by UV−vis, Fourier transform infrared (FTIR) circular dichroism (CD) spectroscopies, X-ray diffraction (XRD) patterns, transmission electron microscopy (TEM). Only the complexes produced fibrous assemblies from solutions through two...

Novel bis(phthalocyaninato)lutetium(III) complexes substituted with long n-alkyl chains have been synthesized. These complexes, 1a–c, show three kinds of discotic mesophase (Dhd, Dob.d, and DL). Also 1a–c display the primary colours (red, green, blue) electrochromism in their solutions. The solutions oxidized species are nearly red, although those conventional orange.

A series of poly(6-azulenylethynyl)benzenes substituted with n-hexyloxycarbonyl chains at 1,3-positions in azulene rings, i.e., hexakis-, 1,2,4,5-tetrakis-, 1,3,5-tris-, and 1,4-bis(6-azulenylethynyl)benzene derivatives 1, 2, 3, 4b, have been prepared by a simple one-pot reaction involving repeated Pd-catalyzed alkynylation halogenated arenes 6-ethynylazulene and/or ethynylated 6-bromoazulene under Sonogashira-Hagihara conditions. The redox behavior these novel poly(6-azulenylethynyl)benzene...

Abstract A new series of disk-like complexes, bis[1,3-di(p-n-alkoxyphenyl)propane-1,3-dionato]copper(II) (abbreviated as CnO-Cu, n = 1-12), has been synthesized. It was found that each the complexes from C3O-Cu to C12O-Cu is a discogen, and them only one discotic mesophase. first compound substituted by shortest side chains in so far we know. The mesomorphic textures could be observed mosaic for ~ C5O-Cu big broken fan-like C6O-Cu C12O-Cu. cutectic point calculated Le Chatelier-Schröder...

In order to obtain novel "flying-seed-like" liquid crystals, we have prepared a series of bulky group-substituted phthalocyanine derivatives without any long alkyl chains: tetra[4-(triphenylmethyl)-phenoxy]phthalocyaninato copper(II) (1a), tetra[4-(1,1-diphenylethyl)phenoxy]phthalocyaninato (1b), tetra[4-(1-methyl-1-phenylethyl)phenoxy]phthalocyaninato (1c), tetra[4-(tert-butyl)phenoxy]phthalocyaninato (1d), and octa[4-(triphenylmethyl)phenoxy]phthalocyaninato (4). We established by using...

The formation of a metastable supercooled alkyl-π molecular liquid was prohibited by subtle alteration the structure.

Our works on discotic liquid crystalline semiconductors are reviewed. Some of them show very fast carrier mobilities. Novel sandwich rare earth metal complex, bis[octakis(alkylthio)phthalocyaninato]lutetium(III), shows a mobility 0.71 cm 2 /Vs, which is the fastest in crystals at present time, so far as we know. It was also found that novel octaphenoxy- and/or hexaphenoxy-substituted phthalocyanine-based exhibit spontaneous perfect homeotropic alignment tetragonal columnar mesophase. The...

Zinc(II) phthalocyanines 4 and 5 decorated with six optically active alkyl chains one chial diol were synthesized from two phthalonitriles using mixed tetramerization reactions. The self-organizing properties of these complexes related compounds 3, 6, 7 in CHCl3 solution thin film studies by UV−vis, Fourier transform infrared (FT-IR), circular dichroism (CD), vapor pressure osmometeric, powder X-ray diffraction (XRD) measurements. Zinc having a chiral formed an dimer through the formation...

A second-generation 1,3,5-phenylene-based dendritic porphyrin decorated with flexible alkyl chains exhibited a liquid crystallinity, and the inclusion of fullerene within nanospace strongly affected mesophase structure in thermotropic liquid-crystalline phase.

Abstract Studies of 5,10,15,20-tetrakis(4-n-alkylphenyl)porphyrins revealed that the homologues with longer alkyl chains than hexyl were mesomorphic, in contrast to non-mesomorphic alkoxy derivatives. Metal complexes (Co, Ni, Cu, Zn, and Pd) dodecyl derivative also shown exhibit mesophases. These mesophases assigned as discotic lamellar (DL) phases by X-ray diffraction studies.

[structure: see text] This paper describes the cyclotrimerization reaction of di(2-azulenyl)acetylenes (2a,b) catalyzed by Co2(CO)8 to produce hexa(2-azulenyl)benzene derivatives (1a,b). The cyclooligomerization 2a and 2b utilizing CpCo(CO)2 as a catalyst produced (eta5-cyclopentadienyl)[tetra(2-azulenyl)cyclobutadiene]cobalt complexes (3a,b). redox behavior hexakis(6-octyl-2-azulenyl)benzene (1b), bis(6-octyl-2-azulenyl)acetylene (2b), cobalt 3a 3b along with 6-octyl-2-phenylazulene (19)...

A cobalt(II) compound, [Co(C5C12C10-terpy)2](BF4)2 [C5C12C10-terpy = 4',5' ''-decyl-1' ''-(heptadecyloxy)-2,2':6',2' '-terpyridine] with branched alkyl chains, based on a terpyridine frame, was synthesized. The compound exhibits spin transition between low-spin and high-spin thermal hysteresis loop (T(1/2) upward arrow 288 K T(1/2) downward 284 K) at the liquid-crystal temperature. It is first example in compounds which occurs crystal-liquid crystal

In order to obtain discotic compounds exhibiting a cubic mesophase, we synthesised two new series of compounds, 2,3,9,10,16,17,23,24‐octakis(4‐alkoxyphenoxy)phthalocyaninato copper(II) complexes, referred as (C n OPhO)8PcCu (1, = 10, 12, 14), and 2,3,9,10,16,17,23,24‐octakis(3,4,5‐trialkoxyphenoxy)phthalocyaninato [(C O)3PhO]8PcCu (3, which both contain octakis(phenoxy)phthalocyaninato the central core eight or twenty‐four long alkoxy chains in periphery, respectively. Their mesomorphic...

Rod-like π-conjugated anion-responsive acyclic oligopyrroles have been reported to form stacked disk-like components that result in the formation of discotic columnar mesophases as thermotropic liquid crystals.

A series of octakisalkylthiophthalocyanines, (CnS)8PcH2 (n = 8, 10, 12, 16), and their copper(II) complexes, (CnS)8PcCu have been synthesized. Their mesomorphism supramolecular structures investigated by using differential scanning calorimetry, polarizing microscopy, temperature-dependent X-ray diffraction technique electronic spectroscopy. From the spectral results, it was revealed that each compounds has a Dh mesophase in which columnar molecules form mixture parts aggregated dimers...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTOrganic−Inorganic Composites Comprised of Ordered Stacks Amphiphilic Molecular DisksMutsumi Kimura, Kazumi Wada, Kazuchika Ohta, Kenji Hanabusa, Hirofusa Shirai, and Nagao KobayashiView Author Information Department Functional Polymer Science Faculty Textile Technology Shinshu University, Ueda 386-8567, Japan Chemistry, Graduate School Tohoku Sendai 980-8587, Cite this: J. Am. Chem. Soc. 2001, 123, 10, 2438–2439Publication Date (Web):February...

We have synthesized nine novel porphyrin derivatives, 1-8 and 1-Cu, substituted with various steric hindrance groups long flexible chains in order to investigate the relationship between molecular type of derivatives resulting mesophase. Type 4 disc-like (C 12 O) 16 -TTPH 2 (1) -TTPCu (1-Cu) exhibit D h columnar mesophases, which are first examples meso-substituted metal-free copper complexes. 5 strip-like n 8 -BTPH [4 (n=12), (n=16)] having eight at 5,15-positions rd mesophases. On other...

Star-shaped stilbenoid zinc phthalocyanines with π-conjugated oligo(p-phenylenevinylene)s (OPVs) have been prepared for fine-tuning of absorption and fluorescence bands. The direct introduction OPV segments at β-positions Zn induced shifts in the Q-band emission band compared to complex lacking side chains. Furthermore, these strongly depended on number length phthalocyanine modified flexible alkyl chains forms a discotic mesophase bulk. structure was analyzed by X-ray UV−vis measurements....

We used a time-of-flight method to study the charge carrier mobility properties of molecular-aligned discotic liquid crystal semiconductor based on Cu-phthalocyanine. The heated isotropic-phase material was sandwiched between transparent electrodes coated onto glass substrates without conventional alignment layers. This then cooled, and cell obtained, which we make measurements. had fixed molecular due supercooling hexagonal columnar mesophase. It clarified that for electrons as high it...

The synthesis of mesogenic triphenylene-based porphyrazine complexes bearing sixteen decyloxy side-chains is described; the widely extended core-system present leads to an enhanced stability mesophases formed by these complexes.

Abstract Two new octa-substituted disk-like bis(β-diketonato) copper(II) complexes, 8C8-Cu and 8C8O-Cu, have been synthesized. The same type of copper SC9O-Cu, which was synthesized for the first time by A. M. Giroud-Godquin et al., has also prepared. thermal behavior these three complexes investigated means microscopic observations DSC measurements. It found that exhibits not a discotic mesomorphism but usual double melting via isotropic liquid, 8C8O-Cu an unusual discophase had reported...