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Altering the Polymorphic Accessibility of Polycyclic Aromatic Hydrocarbons with Fluorination

Journal Article · · Chemistry of Materials
 [1];  [2];  [3];  [4];  [5]
  1. Princeton Univ., Princeton, NJ (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Cornell Univ., Ithaca, NY (United States)
  3. Columbia Univ., New York, NY (United States); New Jersey City Univ., Jersey City, NJ (United States)
  4. Columbia Univ., New York, NY (United States)
  5. Princeton Univ., Princeton, NJ (United States)

Here, substituting hydrogen with fluorine is an extensively employed strategy to improve the macroscopic properties of compounds for use in fields as diverse as pharmaceutics and optoelectronics. The role fluorine substitution plays on polymorphism—the ability of a compound to adopt more than one crystal structure—has not been previously studied. Yet, this understanding is important as different polymorphs of the same compound can result in drastically different bulk properties (e.g., solubility, absorptivity, and conductivity). Strategies to either promote or suppress the crystallization of particular polymorphs are thus desired. Here, we show that substituting hydrogen with fluorine affects the polymorphic behavior of contorted hexabenzocoronene (cHBC). A polycyclic aromatic hydrocarbon and molecular semiconductor, cHBC exhibits two polymorphs (i.e., P21/c crystal structure which we refer to as polymorph I and a triclinic crystal structure which we refer to as polymorph II) that are accessible through postdeposition processing of amorphous films. While the same two polymorphs remain accessible in fluorinated derivatives of cHBC, fluorination appears to favor the formation of polymorph I, with progressively smaller energy barrier for transformation from polymorph II to polymorph I with fluorination.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1399740
Report Number(s):
LLNL-JRNL--713258
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 10 Vol. 29; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (39)

Isothermal and nonisothermal crystallization kinetics of nylon-11 journal December 1998
Halofluorocarbons, Hydrofluorocarbons, and Related Compounds book March 2013
Understanding Polymorph Transformations in Core-Chlorinated Naphthalene Diimides and their Impact on Thin-Film Transistor Performance journal September 2015
Crystallization behaviour of poly(ether-ether-ketone) journal August 1986
N-type field-effect transistor based on a fluorinated-graphene journal June 2008
Haloacetylation-Driven Transformation of Sandwich Herringbone to Lamellar/Columnar Packing in Pyrene journal September 2016
Halogenation of a Nonplanar Molecular Semiconductor to Tune Energy Levels and Bandgaps for Electron Transport journal February 2015
Applications of Fluorine in Medicinal Chemistry journal July 2015
The molecular electric quadrupole moment and solid-state architecture journal November 1993
Strengthening π–π Interactions While Suppressing C sp2 –H···π (T-Shaped) Interactions via Perfluoroalkylation: A Crystallographic and Computational Study That Supports the Beneficial Formation of 1-D π–π Stacked Aromatic Materials journal October 2012
Fluorine in Pharmaceutical Industry: Fluorine-Containing Drugs Introduced to the Market in the Last Decade (2001–2011) journal December 2013
Tuning Polymorphism and Orientation in Organic Semiconductor Thin Films via Post-deposition Processing journal October 2014
High-Performance Air-Stable n-Channel Organic Thin Film Transistors Based on Halogenated Perylene Bisimide Semiconductors journal May 2009
The Many Roles for Fluorine in Medicinal Chemistry journal August 2008
Tuning Contact Recombination and Open-Circuit Voltage in Polymer Solar Cells via Self-Assembled Monolayer Adsorption at the Organic–Metal Oxide Interface journal September 2013
Post-deposition Processing Methods To Induce Preferential Orientation in Contorted Hexabenzocoronene Thin Films journal December 2012
Partial Fluorination Overcomes Herringbone Crystal Packing in Small Polycyclic Aromatics journal March 2005
Unusual Molecular Conformations in Fluorinated, Contorted Hexabenzocoronenes journal November 2010
A Molecular Complex of Benzene and Hexafluorobenzene journal September 1960
Atomically precise edge chlorination of nanographenes and its application in graphene nanoribbons journal November 2013
Fingerprinting intermolecular interactions in molecular crystals journal January 2002
Fluorine in crystal engineering—“the little atom that could” journal January 2005
Fluorine in medicinal chemistry journal January 2008
Fluorinated organic materials for electronic and optoelectronic applications: the role of the fluorine atom journal January 2007
A simple and robust method for the identification of π–π packing motifs of aromatic compounds journal January 2012
Molecular crystals by design? journal January 2014
Which intermolecular interactions have a significant influence on crystal packing? journal January 2014
Insights into the C–H⋯F–C hydrogen bond by Cambridge Structural Database analyses and computational studies journal January 2015
A new parameter for classification of polycyclic aromatic hydrocarbon crystalline motifs: a Hirshfeld surface investigation journal January 2011
Polymorphism, what it is and how to identify it: a systematic review journal January 2013
Quadrupole moments of benzene, hexafluorobenzene and other non-dipolar aromatic molecules journal January 1980
Kinetics of Phase Change. I General Theory journal December 1939
Kinetics of Phase Change. II Transformation‐Time Relations for Random Distribution of Nuclei journal February 1940
Granulation, Phase Change, and Microstructure Kinetics of Phase Change. III journal February 1941
Suspended heated silicon platform for rapid thermal control of surface reactions with application to carbon nanotube synthesis journal August 2007
Crystal structures of polynuclear aromatic hydrocarbons. Classification, rationalization and prediction from molecular structure journal October 1989
Ferroelectric Polymers journal June 1983
Ferroelectric Behavior in the Copolymer of Vinylidenefluoride and Trifluoroethylene journal February 1980
Ferroelectric Polymers book January 1995

Cited By (6)

Capacitive Organic Anode Based on Fluorinated-Contorted Hexabenzocoronene: Applicable to Lithium-Ion and Sodium-Ion Storage Cells journal November 2018
Fluorination‐Induced Evolution of Columnar Packing in Fluorous Triphenylenes and Benzotriphenylenes journal October 2018
Fluorination‐Induced Evolution of Columnar Packing in Fluorous Triphenylenes and Benzotriphenylenes journal October 2018
Computationally aided design of a high-performance organic semiconductor: the development of a universal crystal engineering core journal January 2019
Polymorphism of terthiophene with surface confinement journal March 2018
Polymorphism of terthio-phene with surface confinement. journalarticle January 2018


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