Fe(III) meso-tetra(4-carboxyphenyl) porphyrin chloride (Fe-TCP chloride) molecules co-deposited together with 5-(octadecyloxy) isophthalic acid (5-OIA) molecules on a highly-ordered pyrolytic graphite were studied with the help of a scanning tunnelingmicroscope (STM) under ambient conditions. The measurementswere carried out at solid-liquid interface. STM images show the formation of one-dimensional Fe-TCP chloride/5-OIA chains stretching tens of nanometers across the surface. The driving mechanism behind the formation of these chains is the physical interaction between the molecules. (C) 2013 Elsevier B.V. All rights reserved.