Advertisement

This site uses cookies to enhance your user experience. By continuing to use this site you are agreeing to our COOKIE POLICY.

ACCEPT AND CLOSE

If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)

ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.

Cyber Savings Season: Get 30% off ACS membership with promo code CYBER24. Offer valid though Dec. 11.

Already an ACS Member?  

Basic

$0 Community Associate

ACS’s Basic Package keeps you connected with C&EN and ACS.

  • Access to 6 digital C&EN articles per month on cen.acs.org
  • Weekly delivery of the C&EN Essential newsletter
JOIN NOW
Standard

$80 Regular Members & Society Affiliates

ACS’s Standard Package lets you stay up to date with C&EN, stay active in ACS, and save.

Eligibility restrictions apply. Review ACS Membership Packages to see if you qualify.

JOIN NOW
Premium

$160 Regular Members & Society Affiliates
$55 Graduate Students
$25 Undergraduate Students

ACS’s Premium Package gives you full access to C&EN and everything the ACS Community has to offer.

  • Unlimited access to C&EN’s daily news coverage on cen.acs.org
  • Weekly delivery of the C&EN Magazine in print or digital format
  • Access to our Chemistry News by C&EN mobile app
  • Significant discounts on registration for most ACS-sponsored meetings
ACS offers discounts for some countries outside the United States. This discount is shown at checkout, if applicable.

JOIN NOW

Thank you!

Your account has been created successfully, and a confirmation email is on the way.

Your username is now your ACS ID.

ENJOY UNLIMITED ACCES TO C&EN

Environment

Chemistry In Pictures

Chemistry in Pictures: Color by solvent

January 23, 2018
Advertisement

Most Popular in Environment

A series of panels shows crystals of various colors.
Credit: Cryst. Growth Des. 2018, DOI: 10.1021/acs.cgd.7b01417

Researchers at the University of Buea, in Cameroon, designed this color-changing chemical sensor. The metal-organic framework (MOF) material, {[Co(34pba)2(H2O)]·1/2DMF·H2O}n, absorbs a range of solvent vapors and responds with a characteristic color change (list below). The material gets its hue-shifting prowess from a phenomenon called solvatochromism, in which the solvent changes the chemical environment around the cobalt ions. The MOF could see use in workplace safety equipment and other applications involving the detection of hazardous solvent vapors.

The MOF before (center) and after exposure to solvents: (a) dichloromethane, (b) chloroform, (c) 1,1,1-trichloroethane, (d) trichloroethylene, (e) chlorobenzene, (f) methanol, (g) ethanol, (h) water, (i) 1,4-dioxane, (j) acetone, (k) DMF, (l) DMA, (m) DMSO.

Credit: Cryst. Growth Des. 2018, DOI: 10.1021/acs.cgd.7b01417

Do science. Take pictures. Win money. Enter our photo contest here.

Related C&EN Content:

C&EN’s Chemistry in Pictures: Solvatochromism

C&EN’s Chemistry in Pictures: Pure color

C&EN’s Chemistry in Pictures: More than meets the I

For more Chemistry in Pictures, visit our new home on cen.acs.org.

Chemical & Engineering News
ISSN 0009-2347
Copyright © 2024 American Chemical Society

You might also like...

Serving the chemical, life science, and laboratory worlds
Chemistry in Pictures: Solvents are for suckers
Serving the chemical, life science, and laboratory worlds
Chemistry in Pictures: Fire in a bottle
Serving the chemical, life science, and laboratory worlds
Chemistry in Pictures: Color splash

Article:

This article has been sent to the following recipient:

0 /1 FREE ARTICLES LEFT THIS MONTH Remaining
Chemistry matters. Join us to get the news you need.
GET MORE
GET MORE