TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: Modification of the carbon nano tube by tetrafunctional imine polymer involves reaction of a compound (B) having 2 amino groups or aldehyde groups and compound (A) having 4 aldehyde group or amino groups in presence of the carbon nano tube. The compound (A) is of formula: A'-X-A-X-A'. The compound (B) is of formula: B'-B-B'.A = groups chosen from formula (1a-1 to 1a-31) such as groups of formula (1a-1, 1a-13, 1a-25 and 1a-29);A' = tetrafunctional group of formula (1b-1 or 1b-2);X = does not exists or alkylene, arylene and (CH2)n-O-, (CH2)n-CO2- ((CH2)n-O2C-);n = integer;B = group chosen from formula (2-1 to 2-10), such as groups of formula (2-1, 2-2, 2-3, 2-4, and 2-5);andB' = amino group or aldehyde group.The compound (A) is a compound which has four aldehyde groups, preferably porphyrin tetra aldehyde or aromatic tetra aldehyde. The compound (B) is a compound which has 1 or 2 amino groups, preferably aromatic diamine. The amount (A) is a compound which has 4 amino groups, preferably porphyrin tetra amine or aromatic tetra amine. The compound (B) is a compound which has 1 or 2 aldehyde groups, preferably aromatic aldehyde. EXAMPLE - Monolayer carbon nano tube was preprocessed and suspension of carbon nano tube (10 ml) was added to 5 M nitric acid (10 ml) and heated at 110 degrees C for 1 hour, cooled to room temperature. The reaction mixture was filtered with membrane filter made from polycarbonate, washed with water and vacuum dried. Octadecyl amine (3) was added to the obtained black solid and mashed uniformly. The mixture was heated at 130degreesC under inert gas atmosphere for 5 days. Ethanol was added and excess octadecyl amine was dissolved. The insoluble carbon nano tube was filtered and operation was repeated for 5 times or more. Excess octadecyl amine was excluded and dried to obtain carbon nano tube/octadecyl amine salt (30 mg). Dichloro benzene compound (o-C6H4Cl2) was made to disperse the preprocessed carbon nano tube and carbon nano tube dispersion liquid (NT solution) was obtained. Prepared porphyrin tetra aldehyde of formula (12) was dissolved in pyridine, and compound solution (1.3 mmol) was prepared. 1,6-diamino pyrene was dissolved in ethanol and 2.6 mmol solution (1,6-Py) was prepared. The NT solution (0.2 ml), compound solution (0.25 ml) and ethanol (3 ml) were accommodated in A flask and ultrasonic wave was applied for 2 minutes. Solution (1,6-Py) (0.25 ml) and ethanol (1 ml) were added and ultrasonic wave was applied for 30 seconds. The mixture was heat-stirred at 75 degrees C under nitrogen atmosphere for 3.8 hours. The imine polymer by reaction with porphyrin tetra aldehyde and 1,6-diamino pyrene was formed, and non-covalent bond modification was performed, and carbon nano tube composite material was obtained. The obtained material had favorable electronic characteristic, dispersibility and photoresponsive property.