FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code B551-500mg
Price £360 ex. VAT

2FIC, high purity building block for non-fullerene acceptors

High quality and expert support available online

Specifications | MSDS | Literature and Reviews

2FIC, namely 2-(5,6-Difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (CAS number 2083617-82-5), is electron deficient. It is used as a building block to prepare non-fullerene acceptors (NFAs) such as ITIC-2F, IHIC-2F, IEIC-2F, IXIC-2F for highly efficient organic photovoltaic devices.

Fluorination of the end groups can further extend the absorption of the targeted NFAs into near infrared (NIR) due to enhanced intramolecular charge transfer between the core of the NFAs and the end 2FIC groups.

2FIC is strong electron-withdrawing and the electron mobility of the NFAs can be promoted by such intermolecular interactions through forming noncovalent F···S and F···H bonds.

2FIC Electron withdrawing building block

Electron withdrawing building block

For the preparation of non-fullerene acceptors (NFAs)

Fluoride substituent 2FIC

Fluoride substituent

Expand the absorption of NFAs into near infrared (NIR)

Worldwide shipping for 2083617-82-5

Worldwide shipping

Quick and reliable shipping

Improved electron mobility

Improved electron mobility

Strong intermolecular interactions from halogen-bonding

General Information

CAS Number 2083617-82-5
Chemical Formula C12H4F2N2O
Molecular Weight 230.17 g/mol
Full Name 2-(5,6-Difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile
Synonyms IC-2F, EG-2F, ID-F, 2-(5,6-Difluoro-2,3-dihydro-3-oxo-1H-inden-1-ylidene)propanedinitrile
Classification / Family Malononitrile, Indanone, Monomer and intermediates, ITIC, None-fullerene acceptors (NFAs), NFA-OSCs, printing electronics

Chemical Structure

IC-2F,  2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile, 2083617-82-5
Chemical structure of 2FIC, 2-(5,6-Difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile

Product Details

Purity >98% (by NMR)
Melting Point N/A
Appearance Pale yellow solid

MSDS Documentation


Literature and Reviews

  1. Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra‐Narrow Band Gap, H. Yao et al., Angew. Chem. Int. Ed., 56, 3045 (2017); doi: 10.1002/anie.201610944.
  2. Molecular Optimization Enables over 13% Efficiency in Organic Solar Cells, W. Zhao et al., J. Am. Chem. Soc., 139(21), 7148-7151 (2017); doi: 10.1021/jacs.7b02677.
  3. A Twisted Thieno[3,4-b]thiophene-Based Electron Acceptor Featuring a 14-π-Electron Indenoindene Core for High-Performance Organic Photovoltaics, S. Xu et al., Adv. Mater., 1704510 (2017); DOI: 10.1002/adma.201704510.
Return to the top