Browsing Chemistry (Scholarly Publications) by Author "BLAU, WERNER"
Now showing items 1-13 of 13
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A2B2-type push-pull porphyrins as reverse saturable and saturable absorbers
SENGE, MATHIAS; BLAU, WERNER (2007)A2B2-type push?pull porphyrins with a strong intramolecular dipole moment have been prepared via Heck and Suzuki coupling reactions as novel materials for use in nonlinear optics (NLO); they display saturable (SA) and ... -
Carbazole-linked porphyrin dimers for organic light emitting diodes: Synthesis and initial photophysical studies
SENGE, MATHIAS; RYAN, AOIFE; TUFFY, BRIAN; BLAU, WERNER (2011)Carbazole linked porphyrin dimers were synthesized in good yields via stepwise Suzuki coupling reactions using bromoporphyrins and borylated carbazoles as the precursors, the latter of which were synthesized via known ... -
Correlation studies on structurally diverse porphyrin monomers, dimers and trimers and their nonlinear optical responses
SENGE, MATHIAS; WANG, JUN; BLAU, WERNER (2009)An investigation of the nonlinear absorption of a wide range of structurally diverse porphyrin monomers, bisporphyrins and trisporphyrins, using open Z-scan technique with 6 ns pulsed laser operating at 532 nm was carried ... -
Effect of solvent and dispersant on the bundle dissociation of single-walled carbon nanotube
COLEMAN, JONATHAN; BLAU, WERNER; GIORDANI, SILVIA; DRURY, ANNA (2005)Single-wall carbon nanotubes (SWCNT) are severely restricted in their applications, as they exist in rope-like bundles. Recently, J. Coleman et al. demonstrated a spectroscopic method to monitor bundle dissociation in low ... -
Gas phase controlled deposition of high quality large-area graphene films
DUESBERG, GEORG; MCEVOY, NIALL; NICOLOSI, VALERIA; BLAU, WERNER (2010)A gas phase controlled graphene synthesis resembling a CVD process that does not critically depend on cooling rates is reported. The controllable catalytic CVD permits high quality large-area graphene formation with deft ... -
Modeling of nonlinear absorption of 5,10-a(2)b(2) porphyrins in the nanosecond regime.
BLAU, WERNER; WANG, JING JING; SENGE, MATHIAS (2013)The nonlinear absorption (NLA) properties of free base and metalated porphyrins with a unique 5,10- A2B2 substitution pattern were studied with open Z-scan technique at 532 nm in the nanosecond regime over a broad range ... -
Molecular Engineering of Nonplanar Porphyrin and Carbon Nanotube Assemblies- a Linear and Nonlinear Spectroscopic and Modeling Study
GIORDANI, SILVIA; SENGE, MATHIAS; RICKARD, DAVID; BLAU, WERNER (2011)The importance of molecular conformation to the nature and strength of noncovalent interactions existing between a series of increasingly nonplanar tetraphenylporphyrin (TPP) derivatives and carbon nanotubes was systematically ... -
Solvent effect on the nonlinear absorption of 5,10-A2B2 meso substituted porphyrins
SENGE, MATHIAS; BLAU, WERNER; WANG, JING (2013)The effect of the solvent on the nonlinear absorptive properties of two series of 5,10-A 2 B 2 porphyrins was investigated with an open Z-scan technique in the ns time regime. The recorded responses, which varied between ... -
Sonication of porphyrin-nanotube composites: a cautionary tale
GIORDANI, SILVIA; BLAU, WERNER (2007)We report the spectroscopic changes of tetraphenylporphyrin carbon nanotube composites in a variety of chlorinated solvents such as chloroform, dichloroethane and dichlorobenzene as a result of sonication. Detailed data ... -
Spectroscopic changes induced by sonication of porphyrin-carbon nanotube composites in chlorinated solvents
GIORDANI, SILVIA; BLAU, WERNER (2007)We report the spectroscopic changes of tetraphenylporphyrin carbon nanotube composites in a variety of chlorinated solvents such as chloroform, dichloroethane and dichlorobenzene as a result of sonication. Detailed data ... -
Synthesis and Analysis of Thin Conducting Pyrolytic Carbon Films
DUESBERG, GEORG; KUMAR, SHISHIR; REZVANI, EHSAN; NOLAN, HUGO; KEELEY, GARETH; BLAU, WERNER; MCEVOY, NIALL (2012)We report on an adjustable process for chemical vapour deposition of thin films of pyrolytic carbon on inert substrates using an acetylene feedstock. Through modification of the reaction parameters control over film thickness ... -
Synthesis of Unsymmetrical meso-Substituted Porphyrins, 1. 5,15-A2B2- and 5,15-A2BC-Type Porphyrins with Donor and Acceptor Groups for Use in Nonlinear Optics and Photodynamic Therapy
SENGE, MATHIAS; BLAU, WERNER (2011)Development of new efficient synthetic strategies leading to more diversified substitution patterns of porphyrin rings is of great importance as it expands the potential applicability of these compounds and provides a ...