Synthesis of Zinc Tetraphenylporphyrin Rigid Rods with a Built-In Dipole was written by Chitre, Keyur;Batarseh, Alberto;Kopecky, Andrew;Fan, Hao;Tang, Hao;Lalancette, Roger;Bartynski, Robert A.;Galoppini, Elena. And the article was included in Journal of Physical Chemistry B in 2015.SDS of cas: 313648-56-5 This article mentions the following:
Three Zn(II) tetraphenylporphyrins (ZnTPP) were synthesized to study the influence of a mol. dipole on the energy level alignment of a chromophore bound to a metal oxide semiconductor: ZnTPP-PE(DA)-IpaOMe (1), ZnTPP-PE-IpaOMe (2), and ZnTPP-PE(AD)-IpaOMe (3). Each contained a rigid-rod linker made of a p-phenylene ethynylene (PE) moiety terminated with the Me ester of an isophthalic acid unit (Ipa). Porphyrins 1 and 3 contained an intramol. dipole in the central Ph ring, which was built by introducing electron donor (D, NMe2) and acceptor (A, NO2) substituents in para position to each other. In 1 and 3, the relative position of the D and A substituents, and therefore the dipole direction, was reversed. Porphyrin 2, without substituents in the linker, was synthesized for a comparison. The structures of precursors to 1 and 3 and the structure of 1 were determined by single crystal x-ray anal. Solution UV-visible and steady-state fluorescence spectra of 1–3 were identical to each other and exhibited the spectral features typical of the ZnTPP chromophore and their electrochem. properties were also very similar. Me esters 1–3 were hydrolyzed to the corresponding carboxylic acids for binding to metal oxide semiconductors. In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5SDS of cas: 313648-56-5).
Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.SDS of cas: 313648-56-5
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics