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The requested page "/en/research/researchareas/node/Many%20complex%20mechanisms%20underlying%20the%20fascinating%20functionalities%20provided%20by%20tetrapyrrolic%20macrocycles%20in%20biochemistry%20have%20been%20already%20unraveled.%20Light%20harvesting,%20molecular%20transport,%20and%20catalytic%20conversion%20are%20some%20of%20the%20processes%20performed%20by%20tetrapyrrole-based%20centers%20embedded%20in%20protein%20pockets.%20The%20main%20function%20is%20determined%20by%20the%20single%20atom%20species%20that%20is%20caged%20in%20the%20macrocycle,%20while%20a%20finer%20tuning%20(band%20gap,%20chemical%20selectivity%20etc)%20is%20granted%20by%20the%20geometric%20and%20electronic%20structure%20of%20the%20tetrapyrrole,%20including%20its%20residues,%20and%20by%20the%20proximal%20and%20distal%20structures%20of%20the%20protein%20surroundings%20that%20exploit%20the%20molecular%20trans-effect%20and%20direct%20weak%20interactions,%20respectively.%20Hence,%20a%20scientific%20and%20technological%20challenge%20consists%20in%20the%20artificial%20replication%20of%20both%20structure%20and%20functionality%20of%20natural%20reaction%20centers%20in%202D%20ordered%20arrays%20at%20surfaces.%20Nano-architected%202D%20metalorganic%20frameworks%20can%20be%20indeed%20self-assembled%20under%20controlled%20conditions%20at%20supporting%20surfaces%20and,%20in%20the%20specific,%20porphyrin-%20and%20phthalocyaninebased%20systems%20have%20been%20widely%20investigated%20in%20ultra-high%20vacuum%20conditions%20by%20means%20of%20surface%20science%20approaches.%20Deep%20insight%20into%20the%20geometry,%20electronic%20structure,%20magnetic%20properties,%20ligand%20adsorption%20mechanisms,%20and%20light%20absorption%20has%20been%20obtained,%20with%20the%20strong%20experimental%20constraint%20of%20vacuum.%20Especially%20in%20the%20case%20of%20the%20interaction%20of%20tetrapyrroles%20with%20ligands,%20this%20limit%20represents%20a%20relevant%20gap%20with%20respect%20to%20both%20comparison%20with%20natural%20counterparts%20from%20the%20liquid%20environment%20and%20potential%20applicative%20views%20at%20both%20solid%E2%80%93liquid%20and%20solid%E2%80%93gas%20interfaces.%20Thus,%20a%20step%20forward%20in%20the%20direction%20of%20near-ambient%20pressure%20is%20strongly%20necessary,%20while%20maintaining%20the%20atomiclevel%20detail%20characterization%20accuracy.%20Nowadays%20this%20becomes%20feasible%20by%20exploiting%20state-of-the-art%20experimental%20techniques,%20in%20combination%20with%20computational%20simulations.%20This%20review%20focusses%20on%20the%20latest%20advances%20in%20this%20direction." could not be found.