The conductances of molecular model junctions comprising a triazatriangulenium platform with or without an ethynyl spacer and an upright Zn-porphyrin are probed with a low-temperature scanning probe microscope. The platform alone is found to be highly conductive. The ethynyl-linked Zn-porphyrin moiety reduces the conductance by three orders of magnitude and leads to an unexpected. non... https://www.diegojavierfares.com/flash-pick-Mooney-M20J-1979-1980-Pilot-s-Operating-Handbook-part-1223-great-buy/