291,697 research outputs found
New performing GC columns with unmatched separation capabilities
No full textGas chromatography (GC) is widely used for qualitative and quantitative analysis in numerous fields, such as petroleum, chemical industry, agriculture, environmental protection, medicine, and so on, due to its high
versatility, high selectivity, simplicity of use, analysis speed, and low sample consumption. The column is the heart of a GC instrumentation, which allows the analyte separation and their recognition and quantification. Commercial columns do not always allow a complete peak separation when compounds (i.e., isomers) are very
similar in molecular weight, polarity, and vapor pressure. The choice of the correct stationary phase, with high selectivity towards target analytes, is the key to obtaining the required chromatographic separation and the subsequent qualitative and quantitative analysis.
Considering the rapid polymer science development and the growing demand for new columns with
improved resolution capabilities, in this work novel stationary phases for capillary GC have been designed, synthesized, and characterized in terms of polarity range, resolution, column efficiency, thermal stability, filmforming properties, and support-deactivating capacity1-5. The separation features of these novel stationary phases allow high-resolution performances for a wide range of compounds, like aromatic anilines, xylenes, aromatic amines, halogenated benzenes, and aromatic aldehydes, with marked capabilities toward isomer separations.References:
[1] T. Sun, M. Ba, Y. Song, W. Li, Y. Zhang, Z. Cai, S. Hu, X. Liu, D. Nardiello, M. Quinto, Analytica Chimica Acta, 2024, 1291, art. no. 342221.
[2] T. Sun, R. Chen, Q. Huang, M. Ba, Z. Cai, H. Chen, Y. Qi, H. Chen, X. Liu, D. Nardiello, M. Quinto, Analytica
Chimica Acta, 2023, 1251, art. no. 340979.
[3] T. Sun, R. Chen, Q. Huang, M. Ba, Z. Cai, S. Hu, X. Liu, D. Nardiello, M. Quinto, ACS Applied Materials and Interfaces, 2022, 14 50, pp. 56132-56142
[4] R. Chen, Z. Cai, W. Li, Q. Huang, D. Nardiello, M. Quinto, X. Liu, S. Hu, T. Sun, Chemistry and Biodiversity, 2022,
19, art. no. e202200829
[5] Q. Huang, Z. Cai, R. Chen, W. Zhang, D. Nardiello, M. Quinto, X. Liu, S. Hu, T. Sun, Microchemical Journal, 2022,
183, art. no. 10808
1, 2-H shift in benzylchlorocarbene: isotope effect and influence of the solvent
No full textLaser flash photolysis of 3-chloro-3-benzyldiazirine and 3-chloro-3-(phenyldideuteriomethyl)diazirine in isooctane over the 60 to -80-degrees-C temperature range gives rise to curved Arrhenius plots for both 1,2-H and 1,2-D migration in benzylchlorcarbene. The k(H)/k(D) values increase smoothly from 0.87 to 2.62 when the temperature increases from -60 to +30-degrees-C. The k(H)/k(D) value is approximately 4 for most of the temperatures studied if a solvent correction is applied. Quantum mechanical tunnelling or the influence of the solvent may be a possible explanation for these observations.PT: J; CR: BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 BONNEAU R, 1992, J PHOTOCH PHOTOBIO A, V68, P97 DIX EJ, 1993, J AM CHEM SOC, V115, P10424 EVANSECK JD, 1990, J PHYS CHEM-US, V94, P5518 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 JACKSON JE, 1994, ADV CARBENE CHEM JONES M, 1980, REACTIVE INTERMEDIAT, V2 KIRMSE W, 1971, CARBENE CHEM LIU MTH, 1984, TETRAHEDRON, V40, P887 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 LIU MTH, 1992, J PHOTOCH PHOTOBIO A, V63, P115 LIU MTH, 1992, J PHYS ORG CHEM, V15, P285 LIU MTH, 1994, RES CHEM INTERMEDIAT, V20, P195 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 MOSS RA, 1992, TETRAHEDRON LETT, V33, P4287 MOSS RA, 1994, ADV CARBENE CHEM MUROV SL, 1973, HDB PHOTOCHEMISTRY NICKON A, 1993, ACCOUNTS CHEM RES, V26, P84 SALIS GA, 1968, J PHYS CHEM-US, V72, P752 SANDER W, 1994, UNPUB SCHAEFER HF, 1979, ACCOUNTS CHEM RES, V12, P288 SCHOLLER WW, 1989, HOUBEN WEYL METHODEN, P41 SHIMANOUCHI T, 1972, TABLES MOL VIBRATION, V1 SUGIYAMA MH, 1992, J AM CHEM SOC, V114, P966 WIERLACHER S, 1993, J AM CHEM SOC, V115, P8943; NR: 25; TC: 20; J9: J PHOTOCHEM PHOTOBIOL A-CHEM; PG: 5; GA: PV021Source type: Electronic(1
Detection of carbonyl oxide from singlet para-nitrophenylchlorocarbene and oxygen
No full textPT: J; CR: BARTLETT PD, 1962, J AM CHEM SOC, V84, P3408 BELL GA, 1985, SPECTROCHIM ACTA A, V41, P1221 BONNEAU R, 1989, J CHEM SOC CHEM COMM, P510 CARMICHAEL I, 1986, J PHYS CHEM REF DATA, V15, P1 CASAL HL, 1984, J AM CHEM SOC, V106, P7623 DUNKIN IR, 1986, J CHEM SOC CHEM COMM, P154 FESSENDEN RW, 1985, CHEM PHYS LETT, V117, P103 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GOULD IR, 1985, TETRAHEDRON, V41, P1987 HARDING LB, 1978, J AM CHEM SOC, V100, P7180 HULL LA, 1978, J ORG CHEM, V43, P2780 KIRMSE W, 1971, CARBENE CHEM KIRMSE W, 1985, CHEM BER, V19, P614 LIU MTH, 1987, CHEM DIAZIRINES, CH5 MOSS RA, 1986, J AM CHEM SOC, V108, P7028 PADWA A, 1969, J ORG CHEM, V34, P2728 SANDER W, 1985, ANGEW CHEM INT EDIT, V24, P988 SANDER W, 1985, ANGEW CHEM, V97, P964 SANDER W, 1986, ANGEW CHEM INT EDIT, V25, P255 SANDER W, 1988, J ORG CHEM, V53, P121 SANDER W, 1988, J ORG CHEM, V53, P2091 SANDER W, 1989, J ORG CHEM, V54, P335 SANDER WW, 1987, SPECTROCHIM ACTA A, V43, P637 SOUNDARARAJAN N, 1988, J AM CHEM SOC, V110, P7143 SUGAWARA T, 1983, CHEM LETT, P1261 TROZZOLO AM, 1962, J AM CHEM SOC, V84, P4990 TROZZOLO AM, 1968, ACCOUNTS CHEM RES, V1, P329 WADT WR, 1975, J AM CHEM SOC, V97, P244 WERSTIUK NH, 1984, CAN J CHEM, V62, P2391; NR: 29; TC: 17; J9: J CHEM SOC CHEM COMMUN; PG: 2; GA: EG981Source type: Electronic(1
Carboxylation of carbenes in low-temperature matrixes
No full textPT: J; CR: ADAM W, 1971, J AM CHEM SOC, V93, P557 ADAM W, 1973, J ORG CHEM, V38, P2269 BAMFORD WR, 1952, J CHEM SOC, P4735 BONNEAU R, 1989, J CHEM SOC CHEM COMM, P510 CHAMPAM OL, 1972, J AM CHEM SOC, V94, P1365 COE PL, 1982, J CHEM SOC CHEM COMM, P362 EISENTHAL KB, 1985, TETRAHEDRON, V41, P1543 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GOULD IR, 1985, TETRAHEDRON, V41, P1587 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, 1985, TETRAHEDRON, V41, P1525 LIU MTH, 1980, J CHEM SOC CHEM COMM, P1482 LIU MTH, 1987, TETRAHEDRON LETT, V28, P1011 MALTSEV AK, 1985, IAN SSSR KH, P2159 MCMAHON RJ, 1987, J AM CHEM SOC, V109, P2456 MILLIGAN DE, 1962, J CHEM PHYS, V35, P2911 MOSS RA, 1989, ACCOUNTS CHEM RES, V22, P15 PLATZ MS, 1990, KINETICS SPECTROSCOP, P239 PUZA M, 1971, SYNTHESIS-STUTTGART, P481 SANDER W, 1988, ANGEW CHEM INT EDIT, V27, P572 SANDER W, 1988, ANGEW CHEM, V100, P577 SANDER W, 1988, J ORG CHEM, V53, P2091 SANDER W, 1990, ANGEW CHEM INT EDIT, V29, P344 SANDER W, 1990, ANGEW CHEM, V102, P362 SANDER WW, 1987, SPECTROCHIM ACTA A, V43, P637 SANDER WW, 1989, J ORG CHEM, V54, P333 SANDER WW, 1989, J ORG CHEM, V54, P4265 SIEBRAND W, 1986, ACCOUNTS CHEM RES, V19, P238 WHELAND R, 1970, J AM CHEM SOC, V92, P6057; NR: 29; TC: 22; J9: J ORG CHEM; PG: 3; GA: HB875Source type: Electronic(1
Energy barrier for 1,2-hydrogen migration in benzylchlorocarbene
No full textPT: J; CR: BODOR N, 1972, J AM CHEM SOC, V94, P9103 BURNETT SM, 1983, CHEM PHYS LETT, V100, P124 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 JONES WM, 1980, REARRANGEMENTS GROUN, V1, P95 KIRMSE W, 1967, CHEM BER, V100, P1491 KIRMSE W, 1971, CARBENE CHEM KYBA EP, 1977, J AM CHEM SOC, V99, P8330 LIU MTH, 1982, CHEM SOC REV, V11, P127 LIU MTH, 1983, TETRAHEDRON LETT, V24, P5713 LIU MTH, 1984, TETRAHEDRON, V40, P887 MOSS RA, 1973, CARBENES, V1 MOSS RA, 1975, CARBENES, V2 POPLE JA, 1983, J AM CHEM SOC, V105, P6389 SCHAEFER HF, 1979, ACCOUNTS CHEM RES, V12, P288 SU DTT, 1978, J AM CHEM SOC, V100, P1972 TOMIOKA H, 1984, J AM CHEM SOC, V106, P454 TURRO NJ, 1982, J AM CHEM SOC, V104, P1754 WARNER PM, 1984, TETRAHEDRON LETT, V25, P4211; NR: 18; TC: 34; J9: J CHEM SOC CHEM COMMUN; PG: 3; GA: AMG08Source type: Electronic(1
Reaction of benzylchlorocarbene with hydrogen chloride
No full textPT: J; CR: BROWN HC, 1942, J AM CHEM SOC, V64, P2223 BUSSEY RJ, 1969, J ORG CHEM, P1323 CLOSS GL, 1962, J AM CHEM SOC, V84, P4350 COCIVERA M, 1963, J AM CHEM SOC, V85, P1702 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 KIRMSE W, 1971, CARBENE CHEM LIU MTH, 1981, J CHEM SOC P2, P53 LIU MTH, 1982, CHEM SOC REV, V11, P127 LIU MTH, 1984, J CHEM SOC CHEM COMM, P1062 LIU MTH, 1984, TETRAHEDRON, V40, P887 MOSS RA, 1973, CARBENES, V1 MOSS RA, 1975, CARBENES, V2; NR: 12; TC: 5; J9: J ORG CHEM; PG: 3; GA: APQ51Source type: Electronic(1
Determination of the photolytic decomposition pathways of benzylchlorodiazirine by C60 probe technique
No full textBy employing C-60 as a chemical probe, the photolysis of benzylchlorodiazirine has been proposed to form carbene and the rearranged products via the excited state. (c) 2006 Elsevier Ltd. All rights reserved.PT: J; CR: AKASAKA T, 1999, ORG LETT, V1, P1509 AKASAKA T, 2000, J AM CHEM SOC, V122, P7134 FREY HM, 1965, J CHEM SOC, P1700 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 HIRSCH A, 1993, CHEM BER, V126, P1061 ISHITSUKA MO, 2004, TETRAHEDRON LETT, V45, P6321 KORSHUNOVA GA, 2000, MOL BIOL+, V34, P823 LIU MTH, 1985, J CHEM SOC CHEM COMM, P982 LIU MTH, 1987, CHEM DIAZIRINES, V1 LIU MTH, 1987, CHEM DIAZIRINES, V2 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 LIU MTH, 1992, J AM CHEM SOC, V114, P3604 LIU MTH, 2003, J ORG CHEM, V68, P7471 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 NIGAM M, 1998, J AM CHEM SOC, V120, P8055 RICHARDS FM, 2000, PROTEIN SCI, V9, P2506 TOMIOKA H, 1984, J AM CHEM SOC, V106, P454 WAKAHARA T, 2002, J AM CHEM SOC, V124, P9465; NR: 18; TC: 0; J9: TETRAHEDRON LETT; PG: 3; GA: 130SPSource type: Electronic(1
Study of 1, 2-chlorine migration in (Alpha,alpha-dichlorobenzyl) chlorocarbene generated by laser flash photolysis of 3-chloro-3-(Alpha,alpha-dichlorobenzyl) diazirine
No full textPT: J; CR: BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 JONES M, 1973, CARBENES, V1 JONES M, 1975, CARBENES, V2 JONES WM, 1980, REARRANGEMENTS GROUN, V1 KIRMSE W, 1971, CARBENE CHEM LAVILLA JA, 1989, J AM CHEM SOC, V111, P6877 LIU MTH, IN PRESS J PHOTOCHEM LIU MTH, IN PRESS J PHYS ORG LIU MTH, 1987, CHEM DIAZIRINES LIU MTH, 1989, J AM CHEM SOC, V111, P6873 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 LIU MTH, 1990, J CHEM SOC CHEM COMM, P1650 MORGAN S, 1991, J AM CHEM SOC, V113, P2782 MOSS RA, 1990, J AM CHEM SOC, V112, P5642 REGITZ M, 1989, METHODEN ORGANISCH E, V19 SCHAEFER HF, 1979, ACCOUNTS CHEM RES, V12, P288; NR: 17; TC: 4; J9: J ORG CHEM; PG: 3; GA: HN858Source type: Electronic(1
Effect of diazirine concentration on the reaction of 3-benzyl-3-chlorodiazirine with methanol
No full textPT: J; CR: GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, 1982, J AM CHEM SOC, V104, P5549 LIU MTH, 1984, J CHEM SOC CHEM COMM, P1062 LIU MTH, 1985, J CHEM SOC CHEM COMM, P982 LIU MTH, 1985, J ORG CHEM, V50, P3218 LIU MTH, 1985, TETRAHEDRON LETT, V26, P3071 LIU MTH, 1986, J CHEM SOC PERK T 2, P1233 LIU MTH, 1986, J PHYS CHEM-US, V90, P75 LIU MTH, 1987, CHEM DIAZIRINES, V1, CH5 TOMIOKA H, 1984, J AM CHEM SOC, V106, P454 TOMIOKA H, 1986, J CHEM SOC CHEM COMM, P1364; NR: 11; TC: 5; J9: J CHEM SOC PERKIN TRANS 2; PG: 3; GA: L7207Source type: Electronic(1
Time-resolved Systems Immunology Reveals a Late Juncture Linked to Fatal COVID-19. Liu et al
No full textSupplemental Tables 1-7 for the paper: Can Liu, Andrew J. Martins, William W. Lau, Nicholas Rachmaninoff, ..., John S. Tsang. (2021). "Time-resolved Systems Immunology Reveals a Late Juncture Linked to Fatal COVID-19." Cell. In Press
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