search for: 1_3_diaminopropane

I have two data frames which has 3 columns each.My first data frame is large like this below "new.col ppm.p. freq.p." "1_3_diaminopropane 3.13859 5.67516" "1_3_diaminopropane 3.137 6.65388" "1_3_diaminopropane 3.13541 8.0142" "1_3_diaminopropane 3.13383 9.64184" "1_3_diaminopropane 3.12075 298.243" "1_3_diaminopropane 3.1152 44.6212" "1_3_diaminopropane 3.10528 337.852"...

I have hundreds of text files which has data like a data frame with three columns.The column names are same in all the files.I need to merge all files into a single big file. My files are like this file1 "new.col" "ppm.p." "freq.p." "1_3_diaminopropane" 3.13859 5.67516 "1_3_diaminopropane" 3.137 6.65388 "1_3_diaminopropane" 3.13541 8.0142 "1_3_diaminopropane" 3.13383 9.64184 file2 "new.col" "ppm.p." "freq.p." "1_3_dimethylurea" 4.80643 88.4026 "1_3_dimethylurea"...