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Jiang G, Dong W, Liao K. Synthesis of alkynyl phosphite ligands and its application in the preparation of high stability one‐component heat‐curable silicone rubber. J Appl Polym Sci 2022. [DOI: 10.1002/app.53398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Guo Jiang
- Key Laboratory for Polymer Processing Engineering of Ministry of Education, Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - Wenyong Dong
- Key Laboratory for Polymer Processing Engineering of Ministry of Education, Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - Kai Liao
- Key Laboratory for Polymer Processing Engineering of Ministry of Education, Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
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2
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Sušanj R, Nemec V, Bedeković N, Cinčić D. Halogen Bond Motifs in Cocrystals of N, N, O and N, O, O Acceptors Derived from Diketones and Containing a Morpholine or Piperazine Moiety. CRYSTAL GROWTH & DESIGN 2022; 22:5135-5142. [PMID: 36097548 PMCID: PMC9461725 DOI: 10.1021/acs.cgd.2c00665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/26/2022] [Indexed: 06/15/2023]
Abstract
In this study, we investigate the halogen bond acceptor potential of oxygen and nitrogen atoms of morpholine and piperazine fragments when they are peripherally located on N,O,O or N,N,O acceptor molecules. We synthesized four acceptor molecules derived from either acetylacetone or benzoylacetone and cocrystallized them with 1,4-diiodotetrafluorobenzene and 1,3,5-triiodotrifluorobenzene. This resulted in eight cocrystals featuring different topicities and geometric dispositions of donor atoms. In all cocrystals, halogen bonds are formed with either the morpholinyl oxygen atom or the terminal piperazine nitrogen atom. The I···Omorpholine halogen bonds feature lower relative shortening values than I···Nterminal, I···Ocarbonyl, and I···Nproximal halogen bonds. The N and O halogen bond acceptor sites were evaluated through calculations of molecular electrostatic potential values.
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Deriabin KV, Islamova RM. Ferrocenyl-Containing Oligosiloxanes and Polysiloxanes: Synthesis, Properties, and Application. POLYMER SCIENCE SERIES C 2022. [DOI: 10.1134/s1811238222700096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Deriabin KV, Dobrynin MV, Islamova RM. A metal-free radical technique for cross-linking of polymethylhydrosiloxane or polymethylvinylsiloxane using AIBN. Dalton Trans 2020; 49:8855-8858. [PMID: 32589173 DOI: 10.1039/d0dt01061h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method was developed for the metal-free cross-linking of silicone rubbers. This process uses azobisisobutyronitrile (AIBN) to selectively react with Si-H and vinyl groups as a free-radical initiator for the thermal curing of polymethylhydrosiloxane (PMHS) and polymethylvinylsiloxane (PMVS). The AIBN-initiated curing reaction between the Si-H groups of PMHS generated Si-O-Si and Si-Si cross-links. In contrast, PMVS was cured via the formation of C-C bonds through "methyl-vinyl" and "vinyl-vinyl" mechanisms. Curing reactions were performed at 80-120 °C in air and confirmed by 13C and 29Si solid state NMR analyses and swelling trials.
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Affiliation(s)
- Konstantin V Deriabin
- Saint Petersburg State University, 7/9, Universitetskaya nab., Saint Petersburg, 199034, Russia.
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Karyappa R, Ching T, Hashimoto M. Embedded Ink Writing (EIW) of Polysiloxane Inks. ACS APPLIED MATERIALS & INTERFACES 2020; 12:23565-23575. [PMID: 32319285 DOI: 10.1021/acsami.0c03011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polysiloxane is a desirable material for the fabrication of devices in microfluidics, lab-on-a-chip, and microelectromechanical systems, but direct patterning of microstructures using liquid polysiloxane resins would require adequate rheological and chemical properties of the resins. In this work, we developed a simple method to fabricate planar microstructures consisting of polysiloxane using commercially available liquid polysiloxane resins without changing their properties. We used a direct ink writing (DIW) printer to dispense curable liquid polysiloxane (with the viscosity in the range of 1-100 Pa·s) in a liquid immiscible with the resins (such as methanol, ethanol, and isopropanol). The contact angle (θ) of the dispensed polysiloxane on the Petri dish increased from 20° in air to 100° in methanol, ethanol, and isopropanol. The increase in the contact angles allowed maintaining the structures of patterned polysiloxane until curing, and the embedding liquid was readily removed by evaporation. We termed this method as embedded ink writing (EIW). The effects of curing time (τ) and nozzle speed (v) on the width of the printed filament (w) were evaluated. EIW achieved the minimum width of the printed filament of 65 μm. EIW enabled direct writing of polysiloxane resins and should find applications in fabricating microfluidic devices, flexible wearables, and soft actuators.
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Affiliation(s)
- Rahul Karyappa
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, 8, Somapah Road, Singapore 487372
| | - Terry Ching
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8, Somapah Road, Singapore 487372
| | - Michinao Hashimoto
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, 8, Somapah Road, Singapore 487372
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8, Somapah Road, Singapore 487372
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6
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Remarkable improvement of organic-to-inorganic conversion of silicone rubber at elevated temperature through platinum-nitrogen catalytic system. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2019.109026] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Kryukova MA, Ivanov DM, Kinzhalov MA, Novikov AS, Smirnov AS, Bokach NA, Yu Kukushkin V. Four-Center Nodes: Supramolecular Synthons Based on Cyclic Halogen Bonding. Chemistry 2019; 25:13671-13675. [PMID: 31232494 DOI: 10.1002/chem.201902264] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/21/2019] [Indexed: 12/30/2022]
Abstract
The isocyanide trans-[PdBr2 (CNC6 H4 -4-X')2 ] (X'=Br, I) and nitrile trans-[PtX2 (NCC6 H4 -4-X')2 ] (X/X'=Cl/Cl, Cl/Br, Br/Cl, Br/Br) complexes exhibit similar structural motif in the solid state, which is determined by hitherto unreported four-center nodes formed by cyclic halogen bonding. Each node is built up by four Type II C-X'⋅⋅⋅X-M halogen-bonding contacts and include one Type I M-X⋅⋅⋅X-M interaction, thus giving the rhombic-like structure. These nodes serve as supramolecular synthons to form 2D layers or double chains of molecules linked by a halogen bond. Results of DFT calculations indicate that all contacts within the nodes are typical noncovalent interactions with the estimated strengths in the range 0.6-2.9 kcal mol-1 .
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Affiliation(s)
- Mariya A Kryukova
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Daniil M Ivanov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Mikhail A Kinzhalov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Andrey S Smirnov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Nadezhda A Bokach
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Vadim Yu Kukushkin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation
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Deriabin KV, Lobanovskaia EK, Novikov AS, Islamova RM. Platinum-catalyzed reactions between Si-H groups as a new method for cross-linking of silicones. Org Biomol Chem 2019; 17:5545-5549. [PMID: 31107495 DOI: 10.1039/c9ob00791a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The platinum-catalyzed self-cross-linking of polymethylhydrosiloxane at RT in air was performed for the first time and proved by 1H, 13C, and 29Si SSNMR and swelling measurements. Quantum chemical modeling of possible structures was investigated. Platinum (0) and (ii) complexes were used as catalysts between the Si-H groups of polymethylhydrosiloxane. Karstedt's catalyst leads to Si-O-Si and Si-Si bond formation, but cis-[PtCl2(BnCN)2] generates predominantly Si-O-Si cross-links. cis-[PtCl2(BnCN)2] allows creating high-quality silicone rubbers without visible mechanical defects. This cross-linking approach can be used to obtain new Si-H-containing silicone materials.
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Affiliation(s)
- Konstantin V Deriabin
- Saint Petersburg State University, 7/9, Universitetskaya nab., Saint Petersburg, 199034, Russia.
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Dobrynin MV, Pretorius C, Kama DV, Roodt A, Boyarskiy VP, Islamova RM. Rhodium(I)-catalysed cross-linking of polysiloxanes conducted at room temperature. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Chay R, Rocha BGM, Pombeiro AJL, Kukushkin VY, Luzyanin KV. Platinum Complexes with Chelating Acyclic Aminocarbene Ligands Work as Catalysts for Hydrosilylation of Alkynes. ACS OMEGA 2018; 3:863-871. [PMID: 31457933 PMCID: PMC6641237 DOI: 10.1021/acsomega.7b01688] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/02/2018] [Indexed: 05/03/2023]
Abstract
This work describes the preparation of a series of platinum-aminocarbene complexes [PtCl{C(N=C a (C6R2R3R4R5CON b ))=N(H)R1}(CNR1)] a-b (8-19, 65-75% isolated yield) via the reaction of cis-[PtCl2(CNR1)2] (R1 = Cy 1, t-Bu 2, Xyl 3, 2-Cl-6-MeC6H3 4) with 3-iminoisoindolin-1-ones HN=C a (C6R2R3R4R5CON b H) (R2-R5 = H 5; R3 = Me, R2, R4, R5 = H 6; R3, R4 = Cl, R2, R5 = H 7). New complexes 17-19 were characterized by elemental analyses (C, H, N), ESI+-MS, Fourier transform infrared spectroscopy (FT-IR), one-dimensional (1H, 13C{1H}), and two-dimensional (1H,1H correlation spectroscopy (COSY), 1H,13C heteronuclear multiple quantum correlation (HMQC)/1H,13C heteronuclear single quantum coherence (HSQC), 1H,13C heteronuclear multiple bond correlation (HMBC)) NMR spectroscopy, and authenticity of known species 8-16 was confirmed by FT-IR and 1H and 13C{1H} NMR. Complexes 8-19 were assessed as catalysts for hydrosilylation of terminal alkynes with hydrosilanes to give vinyl silanes, and complex [PtCl{C(N=C a (C6H3(5-Me)CON b ))=N(H)(2-Cl-6-MeC6H3)}{CN(2-Cl-6-MeC6H3)}] a-b (18) showed the highest catalytic activity. The catalytic system proposed operates at 80-100 °C for 4-6 h in toluene and with catalyst loading of 0.1 mol %, enabling the reaction of a number of terminal alkynes (PhC≡CH, t-BuC≡CH, and 4-(t-Bu)C6H4C≡CH) with hydrosilanes (Et3SiH, Pr3SiH, i-Pr3SiH, and PhMe2SiH). Target vinyl silanes were prepared in 48-95% yields (as a mixture of α/β isomers) and with maximum turnover number of 8.4 × 103. Hydrosilylation of internal alkynes (PhC≡CPh, Me(CH2)2C≡C(CH2)2Me, and PhC≡CMe) with hydrosilanes (Et3SiH, PhMe2SiH) led to the corresponding trisubstituted silylated alkenes in 86-94% yields. Initial observations on the mechanism of the catalytic action of platinum-ADC catalysts 8-19 suggested a molecular catalytic cycle.
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Affiliation(s)
- Rogério
S. Chay
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal
| | - Bruno G. M. Rocha
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal
| | - Armando J. L. Pombeiro
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal
- Saint
Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Vadim Yu. Kukushkin
- Saint
Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Konstantin V. Luzyanin
- Saint
Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K.
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Deriabin KV, Yaremenko IA, Chislov MV, Fleury F, Terent'ev AO, Islamova RM. Similar nature leads to improved properties: cyclic organosilicon triperoxides as promising curing agents for liquid polysiloxanes. NEW J CHEM 2018. [DOI: 10.1039/c8nj02499e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic organosilicon triperoxides were found to be vinyl-selective free-radical initiators for thermal curing at 100–180 °C of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated polymethylhydrosiloxane producing homogeneous transparent silicone rubbers with antibacterial properties.
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Affiliation(s)
| | - Ivan A. Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | | | - Fabrice Fleury
- Mechanism and regulation of DNA repair team
- UFIP CNRS UMR 6286
- Université de Nantes
- 44322 Nantes
- France
| | | | - Regina M. Islamova
- Saint Petersburg State University
- Saint Petersburg
- Russia
- Institute of Macromolecular Compounds
- Russian Academy of Sciences
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Wang D, Klein J, Mejía E. Catalytic Systems for the Cross-Linking of Organosilicon Polymers. Chem Asian J 2017; 12:1180-1197. [PMID: 28394453 DOI: 10.1002/asia.201700304] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/05/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Dengxu Wang
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Strasse 29a 18059 Rostock Germany
- National Engineering Technology Research Center for Colloidal Materials & Key Laboratory of Special Functional Aggregated Materials; Shandong University; 27 Shanda Nanlu 250100 Jinan P. R. China
| | - Johann Klein
- Adhesive Technologies, AR Reactive Systems; Henkel AG & Co KGaA; Henkelstraße 67 40589 Düsseldorf Germany
| | - Esteban Mejía
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Strasse 29a 18059 Rostock Germany
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Islamova RM, Dobrynin MV, Vlasov AV, Eremina AA, Kinzhalov MA, Kolesnikov IE, Zolotarev AA, Masloborodova EA, Luzyanin KV. Iridium(iii)-catalysed cross-linking of polysiloxanes leading to the thermally resistant luminescent silicone rubbers. Catal Sci Technol 2017. [DOI: 10.1039/c7cy02013a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iridium(iii) cross-linking catalysts for silicones show a unique temperature-curing profile and lead to thermally resistant and luminescent silicone rubbers.
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Affiliation(s)
- Regina M. Islamova
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Mikhail V. Dobrynin
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Andrey V. Vlasov
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Anzhelika A. Eremina
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Mikhail A. Kinzhalov
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Ilya E. Kolesnikov
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Andrey A. Zolotarev
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | | | - Konstantin V. Luzyanin
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
- Department of Chemistry
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Bolotin DS, Bokach NA, Kukushkin VY. Coordination chemistry and metal-involving reactions of amidoximes: Relevance to the chemistry of oximes and oxime ligands. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.10.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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16
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Islamova RM, Dobrynin MV, Ivanov DM, Vlasov AV, Kaganova EV, Grigoryan GV, Kukushkin VY. bis-Nitrile and bis-Dialkylcyanamide Platinum(II) Complexes as Efficient Catalysts for Hydrosilylation Cross-Linking of Siloxane Polymers. Molecules 2016; 21:311. [PMID: 26959003 PMCID: PMC6274487 DOI: 10.3390/molecules21030311] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 02/29/2016] [Accepted: 03/01/2016] [Indexed: 11/19/2022] Open
Abstract
cis- and trans-Isomers of the platinum(II) nitrile complexes [PtCl2(NCR)2] (R = NMe2, N(C₅H10), Ph, CH2Ph) were examined as catalysts for hydrosilylation cross-linking of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated poly(dimethylsiloxane-co-ethylhydrosiloxane) producing high quality silicone rubbers. Among the tested platinum species the cis-complexes are much more active catalysts than their trans-congeners and for all studied platinum complexes cis-[PtCl2(NCCH2Ph)2] exhibits the best catalytic activity (room temperature, c = 1.0 × 10(-4) mol/L, τpot-life 60 min, τcuring 6 h). Although cis-[PtCl₂(NCCH2Ph)2] is less active than the widely used Karstedt's catalyst, its application for the cross-linking can be performed not only at room temperature (c = 1.0 × 10(-4) mol/L), but also, more efficiently, at 80 °C (c = 1.0 × 10(-4)-1.0 × 10(-5) mol/L) and it prevents adherence of the formed silicone rubbers to equipment. The usage of the cis- and trans-[PtCl2(NCR)2] complexes as the hydrosilylation catalysts do not require any inhibitors and, moreover, the complexes and their mixtures with vinyl- and trimethylsilyl terminated polysiloxanes are shelf-stable in air. Tested catalysts do not form colloid platinum particles after the cross-linking.
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Affiliation(s)
- Regina M Islamova
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia.
| | - Mikhail V Dobrynin
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia.
| | - Daniil M Ivanov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia.
| | - Andrey V Vlasov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia.
| | - Elena V Kaganova
- Federal State Unitary Enterprise S.V. Lebedev Research Institute for Synthetic Rubber, Gapsal'skaya, 1, 198035 Saint Petersburg, Russia.
| | - Galina V Grigoryan
- Federal State Unitary Enterprise S.V. Lebedev Research Institute for Synthetic Rubber, Gapsal'skaya, 1, 198035 Saint Petersburg, Russia.
| | - Vadim Yu Kukushkin
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia.
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