Here, I will present a particularly interesting class of surface-anchored (metal-organic frameworks and coordination network compounds) materials SURMOFs and CNCs for the fabrication e.g. of 1D (Photonic Band Gap) PBG materials [1] as optical sensors, low-k dielectric thin films [2], optoelectronic/ electrochromic switchable coatings/devices [3] PV devices [4] or as future artificial Light-Harnessing (LH) antenna array assemblies as well as novel hybrid-photocatalyst.[5] Since these materials are highly porous and the size of their pores are highly adjustable, they can be further functionalized (e.g. with different metal/oxo connectors or clusters linked with various organic linkers) e.g. in order to specifically bind target analytes (optical sensing), to electrically load and unload small ions (optoelectronic applications) as well as to act as photon traps, which are able to efficiently absorb, transport and harness light energy over an artificial LH antenna array. In addition, the RI (Refractive Index) as well as the optical properties of SURMOF and CNC materials can be tailored – a fact which makes these materials ideally suited for photonic, optical, optoelectronic, light-harnessing as well as for future solar energy systems like photocatalytic and PV applications. Keywords: SURMOFs, porous thin films, artificial light harnessing, optics and photonics, PV applications, photocatalysis.