Structural, chemical and electrical characterization of organocyclotriphosphazene derivatives and their graphene-based composites

Koran, Kenan

doi:10.1016/j.molstruc.2018.11.009

Cited by 19 publications

(4 citation statements)

References 34 publications

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“…In another study published in the same year, both di and tetra anthracene chalcone substituted cyclophosphazenes were synthesized and doped with graphene at a rate of 2 %. The graphene doped phosphazene compounds were measured around 28 with a 6‐fold increase in their electrical constants and proved the effect of graphene [30] . In the current study inspired by this study, the dielectric constant of the graphene doped phosphazenes obtained in the present study reached a very high value of 167 and yielded a significantly effective result compared to other studies.…”

Section: Resultssupporting

confidence: 68%

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Nanographene‐Doped Chalcone Derivatives of Dioxybiphenyl‐Bridged Dispirocyclotriphosphazenes: Synthesis, Electrical Properties, and DFT Calculations

et al. 2023

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The cyclotriphosphazenes, which constitute an important class of inorganic compounds, can show new properties in the medical or technological fields depending on the properties of the substituted organic/inorganic groups. Herein, we aimed to determine electrical and theoretical properties of the nanographene-doped chalcone derivatives of dioxybiphenyl-bridged dispiro-cyclotriphosphazenes. For this aim, a new series of chalcone substituted spiro-cyclotriphosphazenes (3 a-g) have been synthesized by the reaction of dioxybiphenyl-bridged dispiro-cyclotriphosphazene (3) with chalcone derivatives (1 ag), respectively. Then, nanographene was doped to these spirocyclotriphosphazene 3 a-g using a hydrothermal system. The dielectric constant and loss factor of 4 % graphene-doped chalcone-substituted spiro-cyclotriphosphazene 3 g were determined as 167 and 2147 at 1 kHz, respectively, showing a significant increase compared to compound 3 g. The energy values of HOMO and LUMO orbitals are computed using DFT theory's level of B3LYP/6-31G(d,p). The FMO's energy gap values for 3 a-g were found to be 7. 92, 3.48, 3.26, 3.33, 3.53, 4.03 and 3.75 eV, respectively. Especially at frequencies below 10 kHz, the most striking result was observed for the nanographenedoped 3 d. While the AC conductivity of 3 d at 1 kHz was 3.87 × 10 À 9 S cm À 1 , the conductivity of the graphene-doped 3 d was calculated as 5.00 × 10 À 6 S cm À 1 . In addition, DC conductivity measurements were completed as a function of temperature and linearly increasing graphs were obtained with temperature. The activation energies calculated from the slopes of these graphs were 0.293, 0.305, 0.364 and 0.920 eV for 3 c, 3 d, 3 e and 3 g, respectively.

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Section: Resultssupporting

confidence: 68%

“…Reaction of hexachlorocyclotriphosphazene (Trimer, (2)) with 2,2'dioxybiphenyl was given phosphazene 3. [30,45] A similar method was followed in the synthesis of the obtained compounds 3 a-g. The detailed reaction procedure is given only for the synthesis of compound 3 a.…”

Section: Synthesis Of Chalcone Derivatives Of Dioxybiphenyl-bridged D...mentioning

confidence: 99%

Nanographene‐Doped Chalcone Derivatives of Dioxybiphenyl‐Bridged Dispirocyclotriphosphazenes: Synthesis, Electrical Properties, and DFT Calculations

et al. 2023

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“…Carbon materials [4][5][6], nanofibers [7,8], nanotubes [9][10][11][12], nanoparticles of metal and metal oxides [13,14], graphene [15][16][17][18], and graphene oxide [19], as well as electrically conductive polymers (polyaniline, polypyrrole, and PEDOT:PSS) [20] and environmentally friendly ionic liquids, such as tributyl(octyl) phosphonium bis(trifloromethanesulfonyl) imide [21], can be used as conductive or antistatic agents to reduce the electrical resistance of materials. Carbon nanotubes and graphene have a conjugated structure in which carbon atoms are in the state of sp 2 hybridization, which makes it possible to transfer an electron along the entire carbon chain and conduct an electric current.…”

Section: Introductionmentioning

confidence: 99%

Aryloxyphosphazene-Modified and Graphite-Filled Epoxy Compositions with Reduced Flammability and Electrically Conductive Properties

Konstantinova,

Yudaev,

Orlov

et al. 2023

J. Compos. Sci.

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A method has been developed for producing an epoxy composition based on a low-viscosity epoxy-resorcinol resin, a phosphazene-containing curing agent, isophoronediamine, and thermally expanded graphite as a filler. The degree of cure and the absence of side reactions during the curing process were confirmed using IR spectroscopy. The influence of the content of phosphazene-containing curing agent and filler on the physico-mechanical properties of the composition, its fire resistance, and antistatic properties were studied. Using the UL-94 HB horizontal burning test, it was found that the addition of 10 and 20 wt. % phosphazene-containing curing agent (relative to isophoronediamine) reduces the burning speed by 10 times compared to a sample without phosphazene. The addition of a filler to a composition containing phosphazene reduces the burning speed by 25 times compared to a composition without phosphazene and imparts antistatic properties to the epoxy composition, as evidenced by the specific volume electrical resistance of the order of 101 Ohm·m. Phosphazene-containing curing agent had no statistically significant effect on specific volume electrical resistivity (p > 0.05). Tests of physico-mechanical and adhesive properties (tensile strength, compressive strength, water absorption, water solubility, abrasion resistance, and adhesive strength) of filled epoxy compositions with 10 and 20 wt. % phosphazene-containing curing agent demonstrated that these properties met the requirements for floor coverings in construction and parts of electrical devices.

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“…Endüstri alanında farklı uygulama alanlarına sahip olan www.dergipark.gov.tr/tdfd kalkonların özelliklerinin belirlenmesi ve uygula alanlarının genişletilmesi sebebiyle güncel ve önemli bir konudur. Kalkonların uygulama alanlarından bazıları şunlardır; sitotoksik özellikler [14,15] elektrokromik özellikler [16], floresans özellikleri [17], termal ve dielektrik özellikler [18,20] antimikrobial aktivite [21], anti-HIV aktivite [22,23], antibakterial activite [24], anti-inflammatory [25,26], anti-kanser aktiviteleri [27,28], DNA-bağlanma [29] ve enzim inhibisyonu [30,31] gibi uygulama alanları bulunmaktadır.…”

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Metoksi Sübstitüe Kalkon İçeren Metalliftalosiyanin Bileşiklerinin Sentezi ve Karakterizasyonu

Özen¹

2021

Türk Doğa Ve Fen Dergisi

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Bu çalışmada, kalkon (1) bileşiği sentezlendi. Daha sonra 1 bileşiği 4-nitroftalonitrille reaksiyona sokularak 4-(4-(3-(4metoksifenil)akriloil)fenoksi)ftalonitril (2) bileşiği sentezlendi. 2 bileşiğinden yola çıkarak DBU katalizörlüğünde metalli ftalosiyanin bileşikleri elde edildi. Elde edilen yeni metalli ftalosiyanin bileşikleri DCM, THF, DMF ve DMSO gibi yaygın olarak kullanılan çözücülerde kolaylıkla çözünebilmektedir. Ftalosiyanin bileşiklerinin genellikle çözünürlüğü az olduğu için çok az çözücüde çözünmekte bir kısmı ise hiçbir çözücüde dahi çözünmemektedir. Sentezlenmiş olan bu metalli ftalosiyanin bileşiklerinin yukarıda belirtilen yaygın çözücülerde çözünmesi geniş kullanım ve uygulama alanı sağlayabilir. Sentez sonucu elde edilen bileşiklerin karakterizasyonu FT-IR, 1 H-NMR, 13 C-NMR, UV-Vis ve MALDİ-TOF gibi spektroskopik yöntemler kullanılarak aydınlatılmıştır.

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Structural, chemical and electrical characterization of organocyclotriphosphazene derivatives and their graphene-based composites

Cited by 19 publications

References 34 publications

Nanographene‐Doped Chalcone Derivatives of Dioxybiphenyl‐Bridged Dispirocyclotriphosphazenes: Synthesis, Electrical Properties, and DFT Calculations

Nanographene‐Doped Chalcone Derivatives of Dioxybiphenyl‐Bridged Dispirocyclotriphosphazenes: Synthesis, Electrical Properties, and DFT Calculations

Aryloxyphosphazene-Modified and Graphite-Filled Epoxy Compositions with Reduced Flammability and Electrically Conductive Properties

Metoksi Sübstitüe Kalkon İçeren Metalliftalosiyanin Bileşiklerinin Sentezi ve Karakterizasyonu

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