Gadolinyum (III) asetat içeren yeni tetrapirazinoporfirazinin sentezi ve spektroskopik özellikleri

A new tetrakis-(2-methylpyrazino)porphyrazinato gadolinium(III) acetate complex was synthesized.Elemental analysis, Fourier-Transform Infrared, Ultraviolet-visible, and fluorescence spectroscopytechniques clarified its structure. It can dissolve very well without aggregation in both Dimethylsulfoxide and N, N-Dimethylformamide, which have high dielectric constant and high dipolemoment from polar aprotic solvent type. Its aggregation property was also investigated in dimethylsulfoxide at different concentrations, and it was determined to contain monomeric species. Inaddition, its fluorescence properties were investigated in Dimethyl sulfoxide, and the effect ofgadolinium(III) acetate metal ion as a heavy rare earth element was determined. According to thefindings in this study, it may be used as an electronic and optical material and in varioustechnological applications such as photocatalytic applications. In addition, these findings may beuseful for systems that include changes in pyrazinoporphyrazine-like forms.Yeni tetrakis-(2-metilpirazino)porfirazinato gadolinyum(III) asetat kompleksinin sentezlenip,saflaştırılmasının ardından yapısı element analiz, Fourier-Transform Kızılötesi, Ultraviyole görünür veFloresan spektroskopi teknikleri ile karakterize edildi. Polar aprotik solvent olan ve yüksek dielektriksabitine ve yüksek dipol momente sahip olan hem Dimetil sülfoksit hem de N,N-Dimetilformamidsolventlerinde agregasyon yapmadan iyi bir şekilde çözünebilmektedir. Dimetil sülfoksitte hazırlananbelirli farklı konsantrasyon aralıklarındaki çözeltilerindeki agregasyon özelliği araştırılarak çoğunluklamonomerik türler içerdiği de belirlenmiştir. Ayrıca; dimetil sülfoksitte hazırlanan çözeltisinin floresanözellikleri incelenerek merkezinde ağır bir nadir toprak elementi olarak gadolinyum(III) asetat metaliyonunun etkisi belirlenmiştir. Tetrakis-(2-metilpirazino)porfirazinato gadolinyum(III) asetat, elektronikve optik malzeme olarak ve fotokatalitik uygulamalar gibi çeşitli teknolojik uygulama alanlarındakullanılabilir ve pirazinoporfirazin benzeri formlardaki değişiklikleri içeren sistemler için de faydalıolabilir

Comparison of seedling morphological characteristics in brutian pine (Pinus brutia Ten.) provenances

Çalışma, Burdur-Gölhisar orman fidanlığında yetiştirilen, Bucak (Uludere) orijinli Döşemealtı tohum bahçesi (TB19) (P2) ve Gölhisar (Evciler-Koçaş) orijinli Düzlerçamı tohum bahçesi (TB8)(P1)’nden elde edilen tohumlardan gelen kızılçam fidanları üzerinde gerçekleştirilmiştir. Farklı orijinli ve 1+0 yaşlı kızılçam (Pinus brutia Ten.) fidanları, aynı yetişme ortamında bazı morfolojik özellikler (fidan boyu, kök boğazı çapı, en uzun kök uzunluğu, yan dal, tomurcuk, kök ve ibre sayıları) bakımından karşılaştırılmıştır. Varyans analizi sonuçlarına göre, popülasyonlar fidan boyu ve kök boğazı çapı bakımından benzerlik (p>0.05) gösterirken, kök ve tomurcuk sayısı bakımından popülasyonlar arası anlamlı (p<0.05) farklılıklar tespit edilmiştir. Uygulanan korelasyon analizi sonucunda morfolojik özellikler bakımından genel olarak anlamlı (p<0.05) pozitif ilişkiler ortaya çıkmıştır. Ayrıca, hesaplanan gürbüzlük indisi bakımından en etkili olan faktörler sırasıyla en uzun kökün uzunluğu ve tomurcuk sayısı olarak bulunmuştur. Türk Standartları Enstitüsü (TSE) fidan kalite sınıfları bakımından P1 popülasyonuna ait fidanların %56’sı 1. sınıf, %22’si 2. sınıf, %22’si dikime elverişsizdir. P2 popülasyonunda ise fidanların %84’ü 1. sınıf, %10’u 2. sınıf, %6’sı dikime elverişsiz olarak belirlenmiştir. Elde edilen sonuçlar ışığında, Bucak (Uludere) orijinli fidanların gerek morfolojik özellikler gerekse de TSE fidan kalitesi bakımından daha yüksek değerlere sahip olduğu ortaya çıkmıştır.The study was carried out on Brutian Pine (Pinus brutia Ten.) seedlings from the seeds originated from Dosemealti seed orchard (TB19) (P2) established by Bucak (Uludere) provenance and Duzlercami seed orchard (TB8)(P1) established by Golhisar (Evciler-Kocas) provenance, grown in Burdur-Gölhisar forest nursery. The seedling of the orchards of the species were sampled at 1 + 0 year to compare in terms of some morphological characteristics (seedling height, root collar diameter, root length, side branch, bud, root and needle numbers) at the nursery. According to the results of the variance analysis the seed orchard populations were statistically similar (p>0.05) in terms of seedling length and root collar diameter, while the populations had significant differences (p <0.05) in terms of root and bud numbers. As a result of the correlation analysis, generally significant (p<0.05) positive relationships in terms of morphological features were determined. In addition, the sturdiness index of the seedlings was calculated in the light of the measurements obtained. The most effective factors in the context of the sturdiness index were the length of the longest root and the number of buds, respectively. In terms of seedling quality classes of the Turkish Standards Institute (TSE), 56%of the seedlings were 1st class, 22%were 2nd class, 22%were unsuitable for planting in P1. In the P2 population, 84%of the seedlings were 1st class, 10%2nd class, 6%unsuitable for planting. As a result, it was determined that the seedlings originated from Bucak (Uludere) showed higher growth performance in terms of both morphological characteristics and TSE seedling quality than Golhisar

Photophysical and photochemical properties of a novel thiol terminated low symmetry zinc phthalocyanine complex and its gold nanoparticles conjugate

A novel thiol functionalized zinc phthalocyanine complex (ZnPcSH) is reported in this work. This complex was conjugated to gold nanoparticles. The photophysical and photochemical properties of the complex and the conjugate were investigated. Upon conjugation a blue shift was observed from the UV-Vis spectra. The conjugate showed a decrease in the fluorescence quantum yield and lifetime. An increase in the triplet quantum yield and lifetime was observed for ZnPcSH following conjugation to gold nanoparticles. Both ZnPcSH and its conjugate with gold nanoparticles showed high singlet oxygen quantum yields with the conjugate being higher than the Pc alone.Original publication is available at http://dx.doi.org/10.1039/C3DT32698

Liquid crystalline metal phthalocyanines: Structural organization on the substrate surface

The use of metallo phthalocyanines (MPcs) in technological applications requires certain methodological approaches for thin film fabrication. Among these applications is the implementation of MPc films in electronic devices such as organic field-effect transistors (OFETs) and photovoltaic (PV) devices. For such applications the control of alignment and ordering of MPc molecules within the films remains a considerable challenge. This review provides an overview of films' growth of mesogenic MPcs offering systematic analysis of the influence of different factors on the structural organization of liquid crystalline phthalocyanine films, including phthalocyanines molecular structure, regimes of heating, substrate materials, and type of interfaces. The achievements in the development of methods and approaches for the formation of liquid crystalline phthalocyanine films with controllable alignment and ordering are discussed in sufficient details

Pyrene containing liquid crystalline asymmetric phthalocyanines and their composite materials with single-walled carbon nanotubes

In the present work we have studied the dispersion of single-walled carbon nanotubes in liquid crystalline asymmetrically substituted phthalocyanines (MPc, where M = = Cu, Co, and 2H) bearing one pyrene and six polyoxy groups as side chains. The influence of single-walled carbon nanotubes on the phase behavior of MPcs was investigated using X-ray diffraction, polarized optical microscopy and differential scanning calorimetry. It was demonstrated that the incorporation of small amounts of single-walled carbon nanotubes (≤ ≤ 1 wt.%) does not alter the MPc mesophases. The structural features and the sensor response of composite thin films of MPc with single-walled carbon nanotubes to ammonia vapor (10–50 ppm) was studied and compared with those of the films of pure MPc derivatives

Synthesis and organic solar cell performance of BODIPY and coumarin functionalized SWCNT or graphene oxide nanomaterials

The synthesis and characterization of new hybrid materials based on reduced graphene oxide (rGO) or single walled carbon nanotubes (SWCNTs) covalently functionalized by 4,4-difluoro-8-(4-propynyloxy)-phenyl-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (BODIPY) (2) or 7-(prop-2-yn-1-yloxy)-3-(3,4,5-trimethoxyphenyl)-coumarin (4) as light harvesting groups were described. The organic solar cell performances of these novel nanomaterials in P3HT:PCBM blend were investigated. These covalently bonded hybrid materials (Reduced graphene oxide:BODIPY (GB), reduced graphene oxide:Coumarin (GC), SWCNTs:BODIPY (CB) and SWCNTs:Coumarin (CC)) were prepared by azide-alkyne Huisgen cycloaddition (Click) reaction between azide bearing SWCNTs or rGO and terminal ethynyl functionalized BODIPY (2) or coumarin (4) derivatives. The formation of novel nanomaterials was confirmed by the FT-IR, UV-Vis and Raman spectroscopies and thermogravimetric analysis. The best performance on P3HT:PCBM organic solar cell was produced by SWCNTs:Coumarin (CC) hybrids which was coated on a indium tin oxide coated polyethylene terephthalate film (ITO-PET)). The reference device based on P3HT:PCBM blend without CC showed power conversion efficiency (PCE) of 1.16%, FF of 35% and short-circuit current density (Jsc) of 5.51 mA.cm-2. The reference device with CC hybrids within P3HT:PCBM blend increased the values significantly to 1.62% for PCE, 40% for FF and 6.8 mA.cm-2 for Jsc

Water-soluble quaternized mercaptopyridine-substituted zinc-phthalocyanines

The synthesis and characterization of the new zinc phthalocyanine derivatives, tetra- (non-peripheral, 5) and octa-(peripheral, 6) substituted with 2-mercaptopyridine and their respective quaternized derivatives (8 and 9) are reported. Photochemical and photophysical properties of the new complexes are compared with those of the previously reported peripherally tetra-substituted complexes 7 and 10. The quaternized compounds exhibit excellent solubility in water, making them potential photosensitizers for use in photodynamic therapy (PDT) of cancer. Spectroscopic, aggregation, photophysical and photochemical properties of these complexes are also investigated and compared. Photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen and photodegradation quantum yield) properties of these phthalocyanine photosensitizers are very important for the assessment of these complexes as PDT agents. In this study, the effects of the position of the substituents and quaternization of the substituents on the photophysical and photochemical parameters of the zinc phthalocyanines are also reported. This study also showed that the water-soluble quaternized zinc phthalocyanines strongly bind to blood plasma proteins such as bovine serum albumin (BSA)

Preparation of single wall carbon nanotube-pyrene 3D hybrid nanomaterial and its sensor response to ammonia

In this work, the structural features and sensor response toward ammonia of a three dimensional (3D) SWCNTs material covalently functionalised with 1,6-diethynylpyrene were studied. The target SWCNTs hybrid material was prepared by the reaction of azido substituted SWCNTs with the 1,6-diethynylpyrene containing double terminal alkyne groups via the azide-alkyne Huisgen cycloaddition (Click) reaction. The structure of the 1,6-diethynylpyrene compound was determined by different spectroscopic methods such as FT-IR, 1H-NMR, MALDI-TOF mass, fluorescence and UV–Visible, while its SWCNT-Pyrene 3D hybrid material was characterized by FT-IR, Raman, UV-Visible spectroscopies and thermogravimetric analysis. The morphology of the hybrid films was investigated by scanning electron microscope (SEM). The sensing performance of the SWCNT-Pyrene 3D hybrid material was studied against low-concentrations of NH3 in the range of 0.1-40 ppm by measuring changes in the films' conductivity at different levels of relative humidity. The reversible electrical sensor response toward ammonia was observed both in the case of SWCNT and SWCNT-Pyrene 3D hybrid films however the response values of SWCNT-Pyrene 3D hybrid film were higher than those of SWCNT

Synthesis and characterization of new-type soluble β-substituted zinc phthalocyanine derivative of clofoctol

In this work, we have described the synthesis and characterization of novel zinc (II) phthalocyanine bearing four 2-(2,4-dichloro-benzyl)-4-(1,1,3,3-tetramethyl-butyl)-phenoxy substituents on the peripheral positions. The compound was characterized by elemental analysis and different spectroscopic techniques, such as FT-IR, 1H NMR, MALDI-TOF, and UV-Vis. The Zn (II) phthalocyanine shows excellent solubility in organic solvents such as dichloromethane (DCM), n-hexane, chloroform, tetrahydrofuran (THF), and toluene. Photochemical and electrochemical characterizations of the complex were performed by UV-Vis, fluorescence spectroscopy, and cyclic voltammetry. Its good solubility allows a direct deposition of this compound as film, which has been tested as a solid-state sensing material in gravimetric chemical sensors for gas detection, and the obtained results indicate its potential for qualitative discrimination and quantitative assessment of various volatile organic compounds, among them methanol, n-hexane, triethylamine (TEA), toluene and DCM, in a wide concentration range