A metal-organic framework with ultrahigh glass-forming ability

Publication Date:
2018-03-12
Publisher:
American Association for the Advancement of Science (AAAS)
Electronic ISSN:
2375-2548
Topics:
Natural Sciences in General
Published by:
http://www.aaas.org/
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autor Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
beschreibung Glass-forming ability (GFA) is the ability of a liquid to avoid crystallization during cooling. Metal-organic frameworks (MOFs) are a new class of glass formers ( 1 – 3 ), with hitherto unknown dynamic and thermodynamic properties. We report the discovery of a new series of tetrahedral glass systems, zeolitic imidazolate framework–62 (ZIF-62) [Zn(Im 2– x bIm x )], which have ultrahigh GFA, superior to any other known glass formers. This ultrahigh GFA is evidenced by a high viscosity (10 5 Pa·s) at the melting temperature T m , a large crystal-glass network density deficit (/ g ) network , no crystallization in supercooled region on laboratory time scales, a low fragility ( m = 23), an extremely high Poisson’s ratio ( = 0.45), and the highest T g / T m ratio (0.84) ever reported. T m and T g both increase with benzimidazolate (bIm) content but retain the same ultrahigh T g / T m ratio, owing to high steric hindrance and frustrated network dynamics and also to the unusually low enthalpy and entropy typical of the soft and flexible nature of MOFs. On the basis of these versatile properties, we explain the exceptional GFA of the ZIF-62 system.
citation_standardnr 6203707
datenlieferant ipn_articles
feed_id 228416
feed_publisher American Association for the Advancement of Science (AAAS)
feed_publisher_url http://www.aaas.org/
insertion_date 2018-03-12
journaleissn 2375-2548
publikationsjahr_anzeige 2018
publikationsjahr_facette 2018
publikationsjahr_intervall 7984:2015-2019
publikationsjahr_sort 2018
publisher American Association for the Advancement of Science (AAAS)
quelle Science Advances
relation http://advances.sciencemag.org/cgi/content/short/4/3/eaao6827?rss=1
search_space articles
shingle_author_1 Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
shingle_author_2 Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
shingle_author_3 Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
shingle_author_4 Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
shingle_catch_all_1 A metal-organic framework with ultrahigh glass-forming ability
Glass-forming ability (GFA) is the ability of a liquid to avoid crystallization during cooling. Metal-organic frameworks (MOFs) are a new class of glass formers ( 1 – 3 ), with hitherto unknown dynamic and thermodynamic properties. We report the discovery of a new series of tetrahedral glass systems, zeolitic imidazolate framework–62 (ZIF-62) [Zn(Im 2– x bIm x )], which have ultrahigh GFA, superior to any other known glass formers. This ultrahigh GFA is evidenced by a high viscosity (10 5 Pa·s) at the melting temperature T m , a large crystal-glass network density deficit (/ g ) network , no crystallization in supercooled region on laboratory time scales, a low fragility ( m = 23), an extremely high Poisson’s ratio ( = 0.45), and the highest T g / T m ratio (0.84) ever reported. T m and T g both increase with benzimidazolate (bIm) content but retain the same ultrahigh T g / T m ratio, owing to high steric hindrance and frustrated network dynamics and also to the unusually low enthalpy and entropy typical of the soft and flexible nature of MOFs. On the basis of these versatile properties, we explain the exceptional GFA of the ZIF-62 system.
Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
American Association for the Advancement of Science (AAAS)
2375-2548
23752548
shingle_catch_all_2 A metal-organic framework with ultrahigh glass-forming ability
Glass-forming ability (GFA) is the ability of a liquid to avoid crystallization during cooling. Metal-organic frameworks (MOFs) are a new class of glass formers ( 1 – 3 ), with hitherto unknown dynamic and thermodynamic properties. We report the discovery of a new series of tetrahedral glass systems, zeolitic imidazolate framework–62 (ZIF-62) [Zn(Im 2– x bIm x )], which have ultrahigh GFA, superior to any other known glass formers. This ultrahigh GFA is evidenced by a high viscosity (10 5 Pa·s) at the melting temperature T m , a large crystal-glass network density deficit (/ g ) network , no crystallization in supercooled region on laboratory time scales, a low fragility ( m = 23), an extremely high Poisson’s ratio ( = 0.45), and the highest T g / T m ratio (0.84) ever reported. T m and T g both increase with benzimidazolate (bIm) content but retain the same ultrahigh T g / T m ratio, owing to high steric hindrance and frustrated network dynamics and also to the unusually low enthalpy and entropy typical of the soft and flexible nature of MOFs. On the basis of these versatile properties, we explain the exceptional GFA of the ZIF-62 system.
Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
American Association for the Advancement of Science (AAAS)
2375-2548
23752548
shingle_catch_all_3 A metal-organic framework with ultrahigh glass-forming ability
Glass-forming ability (GFA) is the ability of a liquid to avoid crystallization during cooling. Metal-organic frameworks (MOFs) are a new class of glass formers ( 1 – 3 ), with hitherto unknown dynamic and thermodynamic properties. We report the discovery of a new series of tetrahedral glass systems, zeolitic imidazolate framework–62 (ZIF-62) [Zn(Im 2– x bIm x )], which have ultrahigh GFA, superior to any other known glass formers. This ultrahigh GFA is evidenced by a high viscosity (10 5 Pa·s) at the melting temperature T m , a large crystal-glass network density deficit (/ g ) network , no crystallization in supercooled region on laboratory time scales, a low fragility ( m = 23), an extremely high Poisson’s ratio ( = 0.45), and the highest T g / T m ratio (0.84) ever reported. T m and T g both increase with benzimidazolate (bIm) content but retain the same ultrahigh T g / T m ratio, owing to high steric hindrance and frustrated network dynamics and also to the unusually low enthalpy and entropy typical of the soft and flexible nature of MOFs. On the basis of these versatile properties, we explain the exceptional GFA of the ZIF-62 system.
Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
American Association for the Advancement of Science (AAAS)
2375-2548
23752548
shingle_catch_all_4 A metal-organic framework with ultrahigh glass-forming ability
Glass-forming ability (GFA) is the ability of a liquid to avoid crystallization during cooling. Metal-organic frameworks (MOFs) are a new class of glass formers ( 1 – 3 ), with hitherto unknown dynamic and thermodynamic properties. We report the discovery of a new series of tetrahedral glass systems, zeolitic imidazolate framework–62 (ZIF-62) [Zn(Im 2– x bIm x )], which have ultrahigh GFA, superior to any other known glass formers. This ultrahigh GFA is evidenced by a high viscosity (10 5 Pa·s) at the melting temperature T m , a large crystal-glass network density deficit (/ g ) network , no crystallization in supercooled region on laboratory time scales, a low fragility ( m = 23), an extremely high Poisson’s ratio ( = 0.45), and the highest T g / T m ratio (0.84) ever reported. T m and T g both increase with benzimidazolate (bIm) content but retain the same ultrahigh T g / T m ratio, owing to high steric hindrance and frustrated network dynamics and also to the unusually low enthalpy and entropy typical of the soft and flexible nature of MOFs. On the basis of these versatile properties, we explain the exceptional GFA of the ZIF-62 system.
Qiao, A., Bennett, T. D., Tao, H., Krajnc, A., Mali, G., Doherty, C. M., Thornton, A. W., Mauro, J. C., Greaves, G. N., Yue, Y.
American Association for the Advancement of Science (AAAS)
2375-2548
23752548
shingle_title_1 A metal-organic framework with ultrahigh glass-forming ability
shingle_title_2 A metal-organic framework with ultrahigh glass-forming ability
shingle_title_3 A metal-organic framework with ultrahigh glass-forming ability
shingle_title_4 A metal-organic framework with ultrahigh glass-forming ability
timestamp 2025-06-30T23:33:30.109Z
titel A metal-organic framework with ultrahigh glass-forming ability
titel_suche A metal-organic framework with ultrahigh glass-forming ability
topic TA-TD
uid ipn_articles_6203707