Fig. 1. Three species porphyrins compounds with different substituents
(a): TPP; (b): TCPP; (c): TAPP

Fig. 2. A Picture of the experimental setup

Fig. 3. Software design flow charts
(a): AutoSpecMS; (b): AutoDataMS

Fig. 4. The interface of the AutoDataMS program

Fig. 5. UV-Vis action spectra of three different ions(a): Protonated TPP; (b): Protonated TCPP; (c): Protonated TAPP
All Spectra are acquired in the range from 210~700 nm and a step of 2 nm. The data were collected by the AutoSpecMS program automatically

Fig. 6. Photodissociation mass spectra of selected ions obtained at different wavelengths
(a), (b) and (c) are the mass spectra of protonated TPP,TCPP and TAPP obtained with laser irradiation at 433 nm, while (d), (e) and (f) are ones obtained with laser at 550 nm, respectively

Fig. 7. Yield spectra of different fragment ions from different parent ions
(a): Fragment ion of m/z 538 from the protonated TPP; (b): Fragment ions of m/z 670 (in red) and m/z 745 (in black) from the protonated TCPP; (c): Fragment ions of m/z 583 (in red) and m/z 658 (in black) from the protonated TAPP

Fig. 8. 2D photodissociation mass spectra of protonated
(a): TPP; (b): TCPP; (c): TAPP

Fig. 9. Correlation coefficient diagram of TPP photodissociation fragments