The Infrared Spectra of Some New Derivatives of <i>S</i>-Triazine

Loughran, G. A.; Ehlers, Gerhard F. L.; Crawford, William; Burkett, Jerald L.; Ray, James D.

doi:10.1366/000370264789620420

Cited by 25 publications

(13 citation statements)

References 7 publications

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“…It had previously been established that strong absorptions for uncoordinated H 3 TMT occur at 1540, 1125, and 745 cm -1 and are characteristic of the nonaromatic, trithione form of the TMT ring system (Figure 1a). 10 The aromatic, trithiol form of the ring (Figure 1b), on the other hand, was characterized by the presence of three strong absorptions located at 1490, 1245, and 860 cm -1 . These were observed, for example, in the spectrum of (CH 3 ) 3 TMT (Figure 1b) 11 and transition-metal compounds of the formula M 3 (TMT) 2 (M ) Co, Cu).…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Bonding with Sulfur

Krepps

Parkin

Atwood

2001

Crystal Growth & Design

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ABSTRACT:The hydrogen-bonding capabilities of the sulfur-containing molecule trimercaptotriazine (TMT) was explored using various amines. The amines were chosen to observe the effect of varying base strength on the resulting hydrogen-bonded structures. (5) were characterized by melting point, elemental analysis, infrared spectroscopy, and X-ray crystallography. It was found that the TMT molecule is readily deprotonated by all of the amines and that the subsequent ammonium hydrogens formed several types of hydrogen bonds. Importantly, these bonds were observed to form with the sulfur atoms of the TMT, with S‚‚‚N distances of 3.3-3.5 Å.

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Section: Resultsmentioning

confidence: 99%

Hydrogen Bonding with Sulfur

Krepps

Parkin

Atwood

2001

Crystal Growth & Design

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“…This ∼10 cm −1 energy difference between the CO stretching of P1‐X and P2 is indicative of the formation of regular well‐ordered hydrogen bonding network in the P1‐X state . Two new signals centered at 3435 cm −1 and 3258 cm −1 in the P1‐X state correspond to vibration of free and hydrogen bonded NH of the sym ‐triazine, respectively . Analysis of the infrared absorption profile of the P1‐M state showed non‐ordered urethane and sym ‐triazine hydrogen bonding motifs as well as a significant contribution of free urethane fragments (1738 cm −1 CO vibration).…”

Section: Resultsmentioning

confidence: 97%

Supramolecular elastomers: Switchable mechanical properties and tuning photohealing with changes in supramolecular interactions

Razgoniaev

Mikhailov

Obrezkov

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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To study light-triggered self-healing in supramolecular materials, we synthesized supramolecular thermoplastic elastomers with mechanical properties that were reversibly modulated with temperature. By changing the supramolecular architecture, we created polymers with different temperature responses. Detailed characterization of the hydrogen-bonding material revealed dramatically different temperature and mechanical stress response due to two different stable states with changes in the hydrogen bonding interactions. A semicrystalline state showed no response to oscillatory shear deformations while the melt state behaved as a typical energy dissipative material with a clear crossover between storage and loss moduli. Comparison studies on heat generation after light excitation revealed no differences in photo-thermal conversion when an Fe(II)-phenanthroline chromophore was either physically blended into the H-bonding polymer or covalently attached to the supramolecular network. These materials showed healing of scratches with light-irradiation, as long as the overlap of material absorbance and laser excitation was sufficient. Differences in the efficiency and rate of photohealing were observed, depending on the type of supramolecular interaction, and these were attributed to the differences in the thermal response of the materials' moduli. Such results provide insight into how materials can be designed with chromophores and supramolecular bonding interactions to tune the lighthealing efficiency of the materials.

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“…Furtherly increasing the temperature (spectra at 700 s, i.e. 350°C), the gas species present a spectrum close to phenyl triazine, indicating that all the species are volatized and available for gas phase reaction [34]. This is clearer in the spectra collected during the isothermal step (spectra at 2500 s), in which a new large band centered at 1690 cm −1 is visible.…”

Section: Hrms Analysismentioning

confidence: 88%

Come to light: Detailed analysis of thermally treated Phenyl modified Carbon Nitride Polymorphs for bright phosphors in lighting applications

Porcu

Roppolo

Sarais

et al. 2020

Applied Surface Science

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Carbon Nitride and its polymorphs have recently gained large interests for their huge properties and applications in different fields, from lighting to photocatalysis. Further, several attempts were recently devoted to tune and control its optical and electrical properties. In this report we analyze phenyl modified Carbon Nitride structures obtained by simple thermal polymerization at different temperatures (250-400°C) of the starting precursor: 2,4diamino-6-phenyl-1,3,5-triazine. A multi-technique experimental data (XRD patterns, Raman, TGA and DTG, steady-time and time resolved Luminescence, Photoluminescence Excitation spectra, Reflectivity spectra) was applied to analyze the relationship between structural and optical properties and to give more insight on the effect of synthesis procedure on the final polymer. The optical properties evidenced an interesting shift towards the visible region of the absorption spectrum of the phenyl modified g-C 3 N 4 polymer that, associated with the high optical quantum yield (about 60%) and to a broad emission in the green-red spectral region, makes the samples very suitable for lighting applications. Indeed, we report a first prototype of white LED emission by assembly of a commercial blue LED and the Phenyl modified g-C 3 N 4 powders as phosphor, verifying the structural and optical stability over about 10,000 working hours.

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The Infrared Spectra of Some New Derivatives of S-Triazine

Cited by 25 publications

References 7 publications

Hydrogen Bonding with Sulfur

Hydrogen Bonding with Sulfur

Supramolecular elastomers: Switchable mechanical properties and tuning photohealing with changes in supramolecular interactions

Come to light: Detailed analysis of thermally treated Phenyl modified Carbon Nitride Polymorphs for bright phosphors in lighting applications

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