BIRDS characterization. Temperature dependencies of chemical shifts of P1 and P2 and their chemical shift differences (P1-P2) in dendrimeric chelates: (A) P1, (F) P2, and (K) P1-P2 of G1-(TmDOTA)6; (B) P1, (G) P2, and (L) P1-P2 of G2-(TmDOTA)12; (C) P1, (H) P2, and (M) P1-P2 of Rhodamine-G2-(TmDOTA)12; (D) P1, (I) P2, and (N) P1-P2 of G3-(TmDOTA)25; and (E) P1, (J) P2, and (O) P1-P2 of G4-(TmDOTA)39. The temperature sensitivities (CT) of each proton determined with eq 1 are shown in Table 2.