Phthalocyanine Compounds for Sensing Carbon Dioxide and Use

A sensor for detecting carbon dioxide, the sensor comprising a compound of Formula (Ia) or (Ib)

• wherein:
• in Formula (Ia) M is any suitable metallic species;
• and
• each of R1 to R16 is independently a H, a halogen, or an organic moiety of Formula (II)
• X—Y—NR17R18 (II),
• wherein:
• X is a direct bond, SO2, SO, PO3, or a heteroatom selected from the group consisting of N, O, P, S, and Se;
• Y is absent or if present, Y is a linear or branched, substituted or unsubstituted C1-C10 alkyl;
• linear or branched, substituted or unsubstituted C2-C10 alkenyl;
• linear or branched, substituted or unsubstituted C2-C10 alkynyl;
• linear or branched, substituted or unsubstituted alkoxy;
• substituted or unsubstituted C3-C10 cycloalkyl;
• substituted or unsubstituted C3-C10 heterocycloalkyl;
• substituted or unsubstituted C3-C10 cycloalkenyl;
• substituted or unsubstituted C3-C10 heterocycloalkenyl;
• substituted or unsubstituted C6-C10 aryl;
• substituted or unsubstituted C3-C15 heteroaryl;
• and
• each of R17 and R18 is a H or a linear or branched, substituted or unsubstituted C1-C22 alkyl;
• or
• R17 and R18 together with N in the organic moiety of Formula (II) form a substituted or unsubstituted C3-C10 heteroalicyclic ring or a substituted or unsubstituted C3-C15 heteroaryl,
• with the proviso that one or more of R1 to R16 are the organic moiety of Formula (II).