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Fluorous Metal–Organic Frameworks and Nonporous Coordination Polymers as Low‐κ Dielectrics
Author(s) -
Galli Simona,
Cimino Alessandro,
Ivy Joshua F.,
Giacobbe Carlotta,
Arvapally Ravi K.,
Vismara Rebecca,
Checchia Stefano,
Rawshdeh Mustafa A.,
Cardenas Christian T.,
Yaseen Waleed K.,
Maspero Angelo,
Omary Mohammad A.
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201904707
Subject(s) - materials science , dielectric , polymer , polarizability , porosity , chemical engineering , coordination polymer , metal organic framework , metal , pellet , polymer chemistry , organic chemistry , composite material , molecule , metallurgy , chemistry , optoelectronics , adsorption , engineering
A fluorous metal–organic framework [Cu(FBTB)(DMF)] (FMOF‐3) [H 2 FBTB = 1,4‐bis(1‐ H ‐tetrazol‐5‐yl)tetrafluorobenzene] and fluorous nonporous coordination polymer [Ag 2 (FBTB)] (FN‐PCP‐1) are synthesized and characterized as for their structural, thermal, and textural properties. Together with the corresponding nonfluorinated analogues lc‐[Cu(BTB)(DMF)] and [Ag 2 (BTB)], and two known (super)hydrophobic MOFs, FMOF‐1 and ZIF‐8, they have been investigated as low‐dielectric constant (low‐κ) materials under dry and humid conditions. The results show that substitution of hydrogen with fluorine or fluoroalkyl groups on the organic linker imparts higher hydrophobicity and lower polarizability to the overall material. Pellets of FMOF‐1, FMOF‐3, and FN‐PCP‐1 exhibit κ values of 1.63(1), 2.44(3), and 2.57(3) at 2 × 10 6 Hz, respectively, under ambient conditions, versus 2.94(8) and 3.79(1) for lc‐[Cu(BTB)(DMF)] and [Ag 2 (BTB)], respectively. Such low‐κ values persist even upon exposure to almost saturated humidity levels. Correcting for the experimental pellet density, the intrinsic κ for FMOF‐1 reaches the remarkably low value of 1.28, the lowest value known to date for a hydrophobic material.