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 B581-500mg
Price £360 ex. VAT

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

Free worldwide shipping on qualifying orders

2ClIC (CAS number 2197167-50-1), namely 2-(5,6-dichloro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile, is used as a building block to prepare non-fullerene acceptors (NFAs) such as ITIC-DCl, IEICO-4Cl, IXIC-4Cl and BTP-4Cl for highly efficient non-fullerene organic solar cells (NFOSCs).

Comparing with 2FIC, chlorination is believed to have a more pronounced role in enhancing intermolecular charge transfer (ICT) effect than fluorination does. However, chlorinated NFAs in general have reduced lowest unoccupied molecular orbit (LUMO) levels, leading to reduced open-circuit voltages (VOC) that could cost in general the overall PCE of the resulting OPV cells.

2197167-50-1 Electron withdrawing building block

Electron withdrawing building block

For the preparation of non-fullerene acceptors

High purity B581

High purity

>98% pure

Worldwide shipping for B581

Worldwide shipping

Quick and reliable shipping

2197167-50-1 indanone derivative

chloride substituent

Enhances intermolecular charge transfer

General Information

CAS Number 2197167-50-1
Chemical Formula C12H4Cl2N2O
Molecular Weight 263.08 g/mol
Full Name 2-(5,6-Dichloro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile
Synonyms IC-2Cl, IC-2CN-2Cl, 2-(5,6-Dichloro-3-oxoinden-1-ylidene)propanedinitrile
Classification / Family Malononitrile, Indanone, Monomer and inermediates, ITIC, None-fullerene acceptors (NFAs), NFA-OSCs, printing electronics 

Chemical Structure

2ClIC, 2197167-50-1
Chemical structure of 2ClIC

Product Details

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

MSDS Documentation


Literature and Reviews

  1. Fluorination vs. chlorination: a case study on high performance organic photovoltaic materials, Y. Zhang et al., Sci. China Chem., 61 (10), 1328-1337 (2018); doi: 10.1007/s11426-018-9260-2.
  2. Over 14% Efficiency in Organic Solar Cells Enabled by Chlorinated Nonfullerene Small-Molecule Acceptors, H. Zhang et al., Adv. Mater., 30, 1800613 (2018); DOI: 10.1002/adma.201800613.
  3. Achieving over 16% efficiency for single-junction organic solar cells, B. Fan et al., Sci. China Chem., 62, 6 746-752 (2019); doi: 10.1007/s11426-019-9457-5.
  4. Modulation of End Groups for Low-Bandgap Nonfullerene Acceptors Enabling High-Performance Organic Solar Cells, Y Chen et al., Adv. Energy Mater., 1801203 (2018); DOI: 10.1002/aenm.201801203.
Return to the top