X-ray diffraction and IR spectral characteristics of zinc(II)tetra-tert-butylphthalocyanine

Lebedevа, N. Sh.; Parfenyuk, Elena V.; Mal’kova, E. A.

doi:10.1016/j.saa.2006.12.015

Cited by 14 publications

(14 citation statements)

References 3 publications

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“…The spectra of the isomers of H 2 (3 tert Bu)Pc and H 2 (4 tert Bu)Pc are very sim ilar [34]. This fact was confirmed experimentally for Zn(tert Bu) 4 Pc [21]. The introduction of four tert butyl groups in the MPc molecule results in some spectral changes; in particular, the intensity and position of some bands change and some new bands arise, but in general the shape of the spectrum remains the same ( Table 5).…”

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 71%

“…The majority of X ray data are obtained for unsubstituted metal phthalocyanines. The exception is works [19][20][21], which are devoted to the study of alkyl and alkoxy substituted MPcs. The introduction of four tert butyl groups contributes to a looser crystal packing (Table 2).…”

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 99%

“…tert Butyl groups are bulky and can interfere with coplanar π-π interaction between phthalocyanine molecules, which will ultimately affect the polymorphic state of the MPc molecules in the crystal. Therefore, we have identified polymorphic forms of Zn(tert Bu) 4 Pc that were characterized by X ray diffraction and IR spectroscopy [21]. The results of X ray analysis are presented in Figs.…”

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 99%

“…As seen from the data [21], the presence of four tert butyl groups in the molecule of zinc(II) tetra(tert butyl)phthalocyanine (Zn(tert Bu) 4 Pc) does not prevent the formation of α and β polymorphs, but this affects the interplanar distance in π stacking and the primary period. The interplanar distance in β poly morph Zn(tert Bu) 4 Pc (3.35 Å) is smaller than that for the form of α Zn(tert Bu) 4 Pc (3.44 Å), but the main difference between the α and β polymorphic forms of Zn(tert Bu) 4 Pc can be reduced to a mutual arrangement between the adjacent MPc molecules: in the case of the β polymorph, the central metal ion of one molecule of phthalocyanine is located in close proximity to atoms 20, 21, or 22 (numbering accord ing to the IUPAC nomenclature) of the neighboring phthalocyanine molecule; in the case of the α form, it is near atoms 23 or 24 (Fig.…”

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 99%

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Polymorphism and molecular metal phthalocyanine complexes

2012

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Generalized data and new results characterizing the molecular metal phthalocyanine com plexes with electron donor and π-π complexing agents are presented. It is shown that the crystalline packing of pseudopolymorphs formed by molecular complexes of metal phthalocyanine : ligand = 1 : 2 is similar to the packing of molecules of metal phthalocyanine in the β polymorphic form, while the molecular complex (1 : 1) shows similarity to the α polymorph. The topography of films based on axial and π-π complexes Zn(tert Bu) 4 Pc is evaluated. It is shown that the surface of films based on biligand complexes is generally smooth, flat, and dense, although there are some rather large crystal lites. The topography of the films is not regular, because the π stacking axis of the pseudopolymorphs of β crystallites is situated perpendicularly to the substrate. Films obtained on the basis of monoligand complexes are layered; the layers are perpendicular to the substrate, and the topography of the film is regular, because the π stacking axis of the pseudopolymorphs of α crystallites is parallel to the quartz substrate. An alternative way to obtain metal phthalocyanines of a given polymorphic modification is discussed.

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Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 71%

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 99%

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 99%

Section: Polymorphic Forms Of Mpcs and Their Characteristicsmentioning

confidence: 99%

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Polymorphism and molecular metal phthalocyanine complexes

2012

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“…On the other hand, Figures 2c and 3c do not show clear peak at around 600 nm. The peak at around 600 nm as shown in Figures 2a, 2b, 3a, and 3b is ascribed to the a-type crystalline form of H 2 TTBPc [10][11]. In particular, it is clear that the electrospinning of H 2 TTBPc=C 60 =PVP increased the absorption peak at around 600 nm as shown in Figure 2a.…”

Section: Spectroscopic Characterizationmentioning

confidence: 81%

Highly Oriented Donor-Acceptor Molecules within Electrospun Nanofibers

Nomoto

Chuangchote

Sagawa

et al. 2011

Molecular Crystals and Liquid Crystals

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Poly(vinylpyrrolidone) (PVP) nanofibers containing 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine free base (H 2 TTBPc) and fullerene (C 60 ) were prepared by electrospinning. The nanofibers were characterized by scanning electron microscopy, UV-visible absorption spectroscopy, and photoluminescence (PL) spectroscopy. Under the various conditions of electrospinning such as the concentrations of PVP and an organic volatile salt, and the sizes of the nozzle, we could find good conditions to obtain as-spun nanofibers of which average diameter was 429 nm. The incorporated H 2 TTBPc in the nanofibers shows highly oriented a -type crystalline state in the presence of C 60 as compared with that of the film prepared by a casting method.

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Reduced Graphene Oxide ‐ Zinc Phthalocyanine Composites as Fascinating Material for Optoelectronic and Photocatalytic Applications

et al. 2017

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Reduced graphene oxide‐ zinc tetra tert‐butyl phthalocyanine (RGO‐ZnTTBPc) hybrid material has been synthesized through the reduction of graphene oxide (GO) in presence of ZnTTBPc. As‐prepared RGO‐ZnTTBPc thin film photodetector exhibited stable and reproducible photocurrent responses with a responsivity of 2 A/W under simulated solar light.A detailed study on electrical transport mechanism reveals the occurrence of phonon assisted quantum tunneling of charge carriers among the defect states present in RGO ‐ ZnTTBPc system. The relaxation dynamics of charge carriers in the composite is modulated by a temperature independent universal function. Furthermore, the resulting hybrid material showed an enhanced photocatalytic activity with 3.5 times higher reduction rate constant over controlled ZnTTBPc towards the reduction of 4‐nitrophenol under solar light irradiation. Superior photoresponse property and photocatalytic reduction was attributed to the synergistic effect between favorable matching of the lowest unoccupied molecular orbital (LUMO) level of ZnTTBPc to the work function of conductive RGO. The present work is especially important in the field of RGO‐based next‐generation photocatalysts and light energy harvesting applications.

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X-ray diffraction and IR spectral characteristics of zinc(II)tetra-tert-butylphthalocyanine

Cited by 14 publications

References 3 publications

Polymorphism and molecular metal phthalocyanine complexes

Polymorphism and molecular metal phthalocyanine complexes

Highly Oriented Donor-Acceptor Molecules within Electrospun Nanofibers

Reduced Graphene Oxide ‐ Zinc Phthalocyanine Composites as Fascinating Material for Optoelectronic and Photocatalytic Applications

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