Beilstein J. Org. Chem.2020,16, 415–444, doi:10.3762/bjoc.16.40
applications related to Chemistry4.0 standards. These were mainly photopolymer coatings, which can be found for applications in the graphic industry or to protect selected substrates. The huge release of heat on demand upon turning ON or OFF the NIR light source enables them for photothermal treatment in
processes requesting heat to initiate either chemical (activated reactions) or physical (melting, evaporation) events.
Keywords: chemistry4.0; cyanine; near infrared; photopolymer; polymer synthesis; sensitizer; Introduction
Cyanines have received in the class of polymethines big attention within the
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Graphical Abstract
Scheme 1:
Structural patterns of several symmetric cyanines relating to trimethines (I), pentamethines (II), ...
Beilstein J. Org. Chem.2019,15, 2798–2800, doi:10.3762/bjoc.15.272
dyes also contribute as essential components in modern applications such as in OLEDs [5][6], solar cells [7][8], organic semiconductors [9], NLO materials [10], photopolymerization [11], or Chemistry4.0 [12].
From its very beginning, dye chemistry is strongly connected to the scientific developments