A Record Chromophore Density in High-Entropy Liquids of Two Low-Melting Perylenes: A New Strategy for Liquid Chromophores

Kushwaha, KhushbuGothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg (author)

Liquid chromophores constitute a rare but intriguing class of molecules that are in high demand for the design of luminescent inks, liquid semiconductors, and solar energy storage materials. The most common way to achieve liquid chromophores involves the introduction of long alkyl chains, which, however, significantly reduces the chromophore density. Here, strategy is presented that allows for the preparation of liquid chromophores with a minimal increase in molecular weight, using the important class of perylenes as an example. Two synergistic effects are harnessed: (1) the judicious positioning of short alkyl substituents, and (2) equimolar mixing, which in unison results in a liquid material. A series of 1-alkyl perylene derivatives is synthesized and it is found that short ethyl or butyl chains reduce the melting temperature from 278 degrees C to as little as 70 degrees C. Then, two low-melting derivatives are mixed, which results in materials that do not crystallize due to the increased configurational entropy of the system. As a result, liquid chromophores with the lowest reported molecular weight increase compared to the neat chromophore are obtained. The mixing strategy is readily applicable to other pi-conjugated systems and, hence, promises to yield a wide range of low molecular weight liquid chromophores.

Yu, Liyang,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)liyangy (author)
Stranius, KatiGothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg(Swepub:gu)xskati (author)
Kumar Singh, Sandeep,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)sikumar (author)
Hultmark, Sandra,1994Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)sanhul (author)
Iqbal, Muhammad NaeemStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)muna7491 (author)
Eriksson, LarsStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)lerik (author)
Johnston, E.Sigrid Therapeutics AB (author)
Erhart, Paul,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)erhart (author)
Müller, Christian,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)cmuller (author)
Börjesson, Karl,1982Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg(Swepub:cth)kb01boka (author)
Göteborgs universitetInstitutionen för kemi och molekylärbiologi (creator_code:org_t)

By the author/editor: Kushwaha, Khushb ...; Yu, Liyang, 1986; Stranius, Kati; Kumar Singh, San ...; Hultmark, Sandra ...; Iqbal, Muhammad ...; show more...; Eriksson, Lars; Johnston, E.; Erhart, Paul, 19 ...; Müller, Christia ...; Börjesson, Karl, ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Polymer Chemistr ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Polymer Technolo ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

By the university: University of Gothenburg; Chalmers University of Technology; Stockholm University

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