NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
TOPOLOGY OF VOIDS AND CHANNELS IN SELECTED PORPHYRINIC COMPOUNDS
Published
Author(s)
Lawrence P. Cook, Greg Brewer, Daniel Siderius, Winnie Wong-Ng
Abstract
Porphyrinic compounds are of increasing interest to the materials science community, yet little attention has been paid to crystallographically controlled voids and channels in these materials. We have conducted an initial survey of the voids and channels in a random subset of 1000 porphyrinic compounds with known crystal structures. By calculations using a rolling-probe subroutine, we have found that about 5% of these compounds have line-of-sight channels, which differ in their topology depending on the crystallography. A small but significant number of porphyrinic compounds have calculated void contents of > 50 volume %. We discuss in detail the void and channel characteristics of four representative compounds, including technological implications.
Cook, L.
, Brewer, G.
, Siderius, D.
and Wong-Ng, W.
(2019),
TOPOLOGY OF VOIDS AND CHANNELS IN SELECTED PORPHYRINIC COMPOUNDS, Powder Diffraction, [online], https://doi.org/10.1017/S0885715619000770, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928548
(Accessed October 10, 2025)