Intrinsic low dielectric behaviour of a highly thermally stable Sr-based metal–organic framework for interlayer dielectric materials

Abstract

A Sr-based metal–organic framework exhibits an intrinsic low dielectric constant after removing the water molecules. A low dielectric constant and high thermal stability make this compound a candidate for use as a low-k material.

Cu-PDC-bpa solid coordination frameworks (PDC=2,5-pyrindinedicarboxylate; bpa=1,2-DI(4-pyridil)ethane)): 2D and 3D structural flexibility producing a 3-c herringbone array next to ideal

“…On the other hand, the mobility of guest molecules in SCFs with interconnected channels can be expected to produce interesting dielectric response [28][29][30]. In this way, focus has also been directed to the possible appearance of electrical order or dielectric anomalies induced by order-disorder processes of polar and/or H-bonded guest molecules located in the channels of the host structures.…”

Fluorous Metal–Organic Frameworks and Nonporous Coordination Polymers as Low‐κ Dielectrics

“…By first‐principle DFT calculations, Warmbier et al subsequently showed that the κ values reported in were underestimated by less than 10%. As far as it is known, promising experimental evidence of κ lower than 2.5 is still infrequent, manifested only by: a) the 2.33(±0.05) value of κ reported for ZIF‐8 thin films at 10 5 Hz stored under ambient conditions with estimated ≈60% relative humidity; b) the 2.4 value shown at 10 5 Hz by pellets of [Sr(1,3‐BDC)] (1,3‐H 2 bdc = benzene‐1,3‐dicarboxylic acid); and c) the 1.2 and 2.1 values reported for films of MOF‐3 and MOF‐5 at 2 × 10 6 Hz, respectively . These authors claim that films of MOF‐5 are stable if exposed to water vapors, but they do not report κ measurements performed after exposure to humidity.…”

Calcium and Strontium Coordination Polymers Based on Rigid and Flexible Aromatic Dicarboxylates: Synthesis, Structure, Photoluminescence and Dielectric Properties

“…Since the frameworks lack positional freedom, dielectric constant of these solids are expected to be low and mostly arise from mobile solvent molecules and polarizability of the organic linkers . To the best of our knowledge, there are only a few papers where dielectric properties of alkaline‐earth metal based coordination polymers have been discussed (Table ) . The pores in CPs/MOFs are generally filled by solvents or counter ions.…”