Porphyrin-fullerene dyads have been there for quite a few decades now and have applications in diverse fields ranging from medicine to energy applications, and as energy storage devices. A variety of methods are available for accurate characterization of such dyads, such as, 1HNMR, Mass Spectra (HRMS or MALDI-TOF), XRD among others. While it is understandable that 1HNMR is a mandatory criterion in combination with mass spectra to characterize the structural features of such systems. The question is what role does 13C NMR play here? or HRMS? These are macromolecular systems and getting accurate 13C spectra is a near to impossible task, the same applies to HRMS as well, and elemental analysis. There are numerous publications on the synthesis of porphyrin-fullerene dyads which do not report, in other words cannot report analysis results such as 13CNMR or elemental analysis or HRMS. Is it fair then to impose 13CNMR/HRMS/elemental analysis as a mandatory criterion for complete characterization of such macromolecules? Shouldn't the standards be different than that for small molecules considering the sheer size and structural complexity? I believe a clean NMR and MALDI-TOF analysis is more than sufficient to establish the structural identity of such molecules. I would love to know the opinion of the scientific community on this matter.

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