Preparation of a deuterated polymer: Simulating to produce a solid tritium radioactive source

Hu, Rui; Kan, Wentao; Xiong, Xingchuang; Wei, Hongyuan

doi:10.1016/j.jnucmat.2017.05.034

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…To assure that the shape of partially deuterated microgels represents the shape of non-deuterated microgels at a given temperature, it is important to know the influence of deuteration on the temperature-dependence of swelling. Furthermore, (partially) deuterated polymers are important for NMR studies for structural determination [46,47,48].…”

Section: Introductionmentioning

confidence: 99%

Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels

et al. 2019

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The effect of deuteration on the volume phase transition (VPT) temperature of poly (N-isopropylmethacrylamide) (pNIPMAM) microgels in aqueous suspension is determined via IR spectroscopy and size measurements by photon correlation spectroscopy (PCS). We study the effect of a hydrogenated and a deuterated solvent (H2O/D2O), and of the hydrogenated and (partially) deuterated monomer. Deuteration of the monomer or copolymerization with deuterated monomers shifts the volume phase transition temperature (VPTT) by up to 8.4 K to higher temperatures, in good agreement with known results for pNIPAM microgels. Moreover, the shape of the swelling curve is found to depend on deuteration, with the highest deuteration leading to the sharpest VPT. Finally, the quantitative agreement between FTIR spectroscopy and PCS evidences the spatial homogeneity of the microgel particles. Our results are rationalized in terms of the effect of deuteration on hydrogen bonding. They shall be of primary importance for any experimental measurements close to the VPT involving isotopic substitution, and in particular contrast variation small angle neutron scattering.

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Section: Introductionmentioning

confidence: 99%

Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels

et al. 2019

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“…This approach has proven to be useful in making many versions of commercially important polyolefins, especially when anionic polymerization is used to make the parent polymers. 34 Side-chain deuterated polybutene was synthesized (Scheme 6 35 ) by using a similar approach. Sizeexclusion chromatography (SEC) data showed a low-M w peak, indicating possible degradation using a Pd/C catalyst.…”

Section: General Methods In Synthesis Of Deuterated Monomers and Poly...mentioning

confidence: 99%

Deuteration and Polymers: Rich History with Great Potential

Jakowski

et al. 2021

Macromolecules

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Deuterium, a stable hydrogen isotope, has been playing important roles in many scientific areas, including polymer science. The developments of deuteration science and polymer science have been interwoven for the past 60 years. The unique characteristics of the scattering lengths for hydrogen isotopes (protium and deuterium) result in the dramatic differences of scattering length densities for protiated and deuterated compounds omnipresent in polymers, rendering neutron scattering a powerful tool for the investigation of polymeric structures and dynamics that are inaccessible to other tools. While the role of deuteration in neutron scattering of polymeric materials can hardly be overstated, it has also enabled the addressing of many questions using other approaches, such as NMR and vibrational spectra. In this Perspective, we provide a brief account of deuterium in the synthesis, properties, and application of various polymers. We also offer an outlook of the potentials in this ever-evolving and exciting area.

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“…For example, Kurita et al [15] . found that deuterium could be added to unsaturated bonds and consequently form saturated bonds when using Pd/C as a catalyst, while only deuterium substitution on unsaturated bonds or other C−H bonds occurred in a mixture of tetrahydrofuran and KOH [16] . The position of unsaturated bonds also affects the deuterium incorporation.…”

Section: Conventional Deuteration Reactionmentioning

confidence: 99%

“…For example, Kurita et al [15] found that deuterium could be added to unsaturated bonds and consequently form saturated bonds when using Pd/C as a catalyst, while only deuterium substitution on unsaturated bonds or other CÀ H bonds occurred in a mixture of tetrahydrofuran and KOH. [16] The position of unsaturated bonds also affects the deuterium incorporation. Deuterium-labeled [D 3 ]-alkenes are easily prepared from terminal alkynes in a single step; however, other alkynes hardly undergo addition reactions in this process (Figure 1).…”

Section: Deuteration Of Unsaturated Cà C Bondsmentioning

confidence: 99%

Recent Advances in the Synthesis of Deuterium‐Labeled Compounds

2021

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Deuterium‐labeled compounds are of importance in chemical, environmental, and biological fields. Preparation methods for deuterium‐labeled compounds have been studied extensively in response to increasing demand for these chemicals. In this review, we summarize recent advances in synthetic methods and present a comprehensive overview of diverse routes, including conventional deuteration and hydrogen‐deuterium exchange. Deuteration by the classical process, which starts from appropriate available labeled precursors, is introduced for different reaction types. Key features of hydrogen‐deuterium exchange are elaborated in detail from the perspective of the catalyst and the chemical structure of the substrate. Regioselective deuteration at the target position is discussed because of the role of stereospecific deuterium labeling in medicine. Finally, challenges and future prospects of these processes are discussed to provide a general guideline for the synthesis of deuterium‐labeled compounds.

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Preparation of a deuterated polymer: Simulating to produce a solid tritium radioactive source

Cited by 10 publications

References 18 publications

Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels

Deuteration-Induced Volume Phase Transition Temperature Shift of PNIPMAM Microgels

Deuteration and Polymers: Rich History with Great Potential

Recent Advances in the Synthesis of Deuterium‐Labeled Compounds

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